Ok, update on this...

I've so far become pretty familiar with Grim Batol and The island in Dustwallow Marsh with the naga-type things.

Grim Batol
Basics:
- All mobs soloable for rogue in T2/T3 gear, including the 62 elites (no teebu's dropped tho ;-) )
- Solo'ing I was at a 30 mob per hour rate, give or take. Duo'ing with similarly equipped hunter = 80 mobs per hour or more.
- I'd subjectively say each is about 2x as hard as Tyr's hand mobs.

Pros:
-Lots of mobs, every single one pullable single.
-Sliding scale of difficulty - mobs start at about 58 elite, go up to 62 elite
-Reasonable Cash drops, perhaps 17 silver per mob or so
-Skinnable for Red Dragon Scales (I'm not a skinner though)
- only one patrol (big red dragon, not soloable), everything else is mostly stationary

Cons:
-Low food drop rate. Hell, low *everything* drop rate. bring your own food. Out of 100 mobs, I think i got 2 grey items and 3 pieces of food, no greens/blues/purples
-High armor mobs. Doesnt matter for some classes, mattered for me
-To be safe, gouge kiting and crippling poison save the day. I never died, but when i didnt try to gouge kite and/or have crippling on, i'd sometimes have to burn cooldowns on the caster mobs and the 62 elites
- no runecloth drops

Alcaz Isle
Basics:
- Same gear setup as above, there are hydras which drop crap, and naga-types which are classified as humanoid.
- I avoided the hydras for the most part and focused on the humanoids (hydras have a dot in a bite form which i abhor as a rogue)
- Subjectively speaking about 1.5x as hard as tyr's hand mobs, grind rate perhaps 45 per hour
- Silver per mob about the same as the dragons.

Pros:
- Much better drops in the limited amount of grinding I did. In half the time I spent in Grim Batol, I got 2 green drops (vs 0), 4 grey drops (vs 2), and 4 food pieces (via clams)
- Mobs are easier, and it's possible to do the 2-pulls without too much problem
- Some mobs are classified as high as 61 elite, meaning you're on the scoreboard for the types of mobs that can drop phat loot.

Cons:
- no runecloth, bring your own bandages.
- the patrolling hydras can put a serious crimp in your plans if you time something wrong, and because of the hilly and wooded terain, you cant always see them coming
- it's on the "bad" continent, so if you go to farm, you have to be prepared for the hike
- repop rate might be an issue, i'm not sure yet

Conclusions so far and next up for examination
So far Alcaz Isle seems *much* better for "fun" grinding, but i dont have a large enough sample size to say that definitively.

The winterspring giants and Hillsbrad foothill undead are next on my list. I'm avoiding the Hederine, i've done them before, but the sucky drops from the mana-hound types, and the chance for wandering aggro are not to my taste. I'd be more interested if the eye of shadow still sold for ridiculously high amounts of gold.

I did a *ton* of librams for my guild, way back when, specced combat. It was also incredibly profitable b/c the run was kill fire elementals on your way to Incendius, kill Incendius for DE mats, go up to the coffer area.

A reasonably good blue geared combat rogue can solo 3 of the 6 keeper spawns (Crafting, Arena, Domicile). Sap a guard, step off, AR/BF down the other guard. If you're doing well, kill keeper, otherwise vanish. Wait for cooldowns, sap guard, kill keeper, kill guard.

Problem being, without Imp Sap, it's 50/50 whether you can get the keeper to spawn (need nearest to be 52 to solo start the chain if you can't imp sap him). It is, however, incredibly easy for a pair of stealth characters to do libram runs (it can be rogue/druid, if the rogue destealths and evasions, he just needs to live long enough for the druid to read the portrait and restealth, then he can vanish.)

I should probably go back to Incendius runs some time; I could use the shards, now that it's a guaranteed blue drop.

I know a druid and warrior in my guild are fond of going to BRD and taking out every dwarf in there, everything except the lyceum/emperor really. I imagine with a shaman and totems it would take no time

This is not soloing but I had a lot of fun doing it with my rogue buddy.

Find a druid friend and go to LBRS, stealth to Warmaster Voone and kill him while the druid heals you. Max out your STA, the biggest risk is Voone bursting you with his MS. If you can get your STA upwards of 4000 you are really pretty safe. Sell his Beaststalker Gloves drops on the AH and split the proceeds. I found these would sell very well, I assume because LBRS is not a popular instance and hunters have a hard time getting them. It is 50-100 g for an hour of work or less (you will probably hit the instance reset cap) and it is a fun change from picking Dreamfoil or farming mobs. Obviously you cannot do it too much or you will saturate the market for Beaststalker.

Well the best place ive found so far (prot warrior though) is maradon all the bosses are soloable and all but 1 pull is avoidable, though you may want to skip noxxion.

The bosses all drop blues (for disenchanting) and its do-able for me in 45 mins per run, i normaly get 25-35 gold per run and if im very lucky a pair of boots of avoidence.

Also the first room of BRS is clearable although you may need a arc pot or 2 for the casters they they drop good silver and tier 0 pieces.

As a priest/mage with decent gear, here's what I do:

Someone mentioned 2manning human strat. VERY good munny there, however, you can do it with 2 mages too. LOS the pulls at the beginning.

Nobody mentioned dire maul west. You can use the ramp to talendris warpwood and pathing kite everything in there. I pull the nearest 6 tree packs and reset. Tunsa munny. Ignore the big guys: they root and hit pretty frikkin hard O_O;;

For a challenge, you can solo most of scholo with a shadow priest. Between shackles and fears, I've solo farmed dark runes and the like. Priests can also do Darkwhisper gorge (good ol fear).

Dire maul east is something the locks in my guild do almost religiously. Tons of fronds, living essences, and almost every mob in there is CCable by them. I believe they duo the side, killing bosses too.

How do you get into that room with a hunter? I've been pet pulling all the ones by ayamiss to the stairs from ossiran, but I don't know how to get past the scorpion packs in the hall.

Not really relevant now, but the boss they added near the entrance to Strat during the undead invasion when Naxx first went live was fun while it lasted. Didn't take long for them to make him a complete pain in the arse though (he was still soloable, but much, much more difficult to get to).

I farmed him a decent bit on my Hunter. Clearing the trash so it wouldn't aggro during the boss was much harder than the boss himself, and dampen magic made him completely trivial.

I also soloed the Imp chase in DM East for my key, back when I was 50% blues. That was a ton of fun.

I assume by human strat you mean not going towards Baron Rivendare. Entering from the Baron side and working towards the humans, I've soloed all the trash, Hearthsinger when he's up, and the Unforgiven on my frost mage alt. I did this to farm my alt's AD rep to revered and got a lot of bone fragments towards the turn ins for the Talisman of Ascendence.

DM west works well for a Warlock too. Even the big guys are doable because of Banish, but mana can be an issue on the Guardian packs for builds without Demonic Sacrifice or Dark Pact. After clearing that area out, a Warlock can clear to Immolthar's chamber and clear that trash too. Either pull towards Tendris Warpwood's ramp since none of the Immolthar trash links to him, or move towards the library to take advantage of Howl of Terror and the large ramp in there.

Siphon Life is all you need to never be close to going OOM on West. Before they buffed the Remnants with a nuke, I could do the entire pylon (8 mobs) in one pull without being close to dying.