I belive that the fastest guilds will be those who don't let anyone behind and still have an "controlled" questing environment with helping on already done quests and having people knowing when to expect guildmates to do a dungeon.

I agree with Trindade here.
I've always looked forward to TBC as a possibility to chose how much you actually want to play or not, and in my case especially to be able to explore some new instances/game content completely unhurried with my best ingame buddies - so I'll surely try to get to 70 in a decent time, but I'm not going to put the screws on neither me nor my guildmates (and that's, as far as I know, what most of my guild thinks about this, as we're on the upper end of how much most of us want to play anyway, four raid days Ã* 4 hours and 6 hours on sunday).

Right, can we please stop talking about some nazi scheldues and "level to 70 by next week or /gkick" ? I didn't proposed anything like this, since this is indeed ridiculous.
I was more worried about other aspects of that period. Such as cliques forming around tank/healers, people lagging behind because they dont play during "rush hours", everything that can create sense of disconnection between guild members. You can call it social aspects.

The period for levelling will be brief, relative to the life of your guild. Cliques and friendships exist, there isn't anything you can do about it. In my view, there's no detrimental aspect to their existance either. Just look at how your group operates now as people form groups for pvp and 5 mans. Is it inclusive? Do your groups form via guildchat, or via whisper? In my guild, at least, what will typically happen is:
- Person A wants to group and asks his/her best pal to do activity X.
- They then LFM in guildchat, and take the first few people who reply that want in, and class balance generally looks after itself.

Typically, tanks and healers will already be 'paired' with one another because those classes gravitate towards eachother due to their symbiotic nature. The rest of the group will form around those partnerships naturally.

If someone has off play times, I don't think they could reasonably express dissatisfaction with their 'disconnection', because its a product of their own play schedule. They will be able to level, because WoW is the sort of game that affords a lot of soloing content. How many people in a serious raid guild can't make it online during peak play hours anyway? I mean, they've been logging on for raids for a year, why would a couple of weeks for levelling be much different?

Not sure why this is an issue for discussion.

The key quest for Tempest Keep starts by going to the Altar of Damnation in Shadowmoon Valley where Gul'dan is located and beginning a questline to deal with the Enraged Elemental spirits that plague Shadowmoon Valley. Its a decently long questline and ends with the Quake symbol. After the end of this you receive a letter from Khadgar in your mail telling you to come visit him (those of us who completed the quest line before the patch though did not receive this). He then gives you a quest to talk about the Tempest Keep key by talking with A'dal (the Naaru were the original owners of Tempest Keep) who then sets forth for you 3 tests to prove your worth to the Naaru that require completing on heroic mode Shadow Labs, Steamvaults, Arcatraz, and Shattered Halls.

Karazhan starts with a quest for the Relentless Spirits outside of Karazhan which was broken till this most recent patch. I've not gone back to check it out but part of it requires going to Steamvaults I know and something as well with one of the 5 mans at Tempest Keep.

Battle of Hyjal requires completing Durnholde then you can get the quest Vial of Times which tells you to get a vial from Kael'thelas and Lady Vashj.

Also the Coilfang 25 Man should require a key called something along the lines of the Waterfall operater key that used to work with a device next to the waterfall though that machine seems deactivated in the latest push.

Seriously, cliques will form. I plan to run 5 mans with certain friends, with bare requirements in terms of class balance. Whoever is online at that time, I will go with, if the group is full I'll just grind outside.

My problem is mostly that I tend to log in much later than most of my friends, so I probably won't be able to join them for the instance starts.

How much will your guild farm/progess in Naxxramas while leveling to 70? Some of us are split between finishing new-to-us content (we really want to see KT dead and finish our two Atieshes) while others are ready to put that consumable-fest as far behind us as possible and start on fresh content.

it will be difficult to keep running naxx once the expansion is out, not to mention it would be a bit counterproductive.

karazhan currently does require running TK raid mode to get keyed I believe, isn't half of the key from Kaelthas? Which makes no sense to me, since I thought TK 25 man was supposed to be harder than Karazhan. Or is that wrong? Not sure, I got my karazhan key on beta from the temp goblin vendor and haven't fully explored the quest line.

No question though, there is a LOT of 5 man rep grinding involved in expansion, I think a lot more than people realize. When you throw in all the instances you must rep up for before you can run heroic, and all the heroics you can run before you can get raid keyed, its going to make the Onyxia key chain look like a walk in the park...

That information is, as far as I know, wrong. While the Karazhan key quest does send you to Tempest Keep at some point, that part is in the Arcatraz.

We figure we'll try this experiment the first couple nights. At our usual raid times, we'll invite folks to join a raid who are looking to 5-man. Based on what's in that raid, we'll then create as many decent 5-mans as we can out of it and send them on their merry way. Now for the folks who are left over, they can elect to party up into small groups for questing.

Since I expect Hellfire to be PvP insanity the first couple nights, I figure this is a good way for folks to get decent exp and gear in relative peace. Whether it'll work or not, who knows?