Read the huge topic around this one.

Notice the giant 10 page thread about this stuff?

Blah blah blah only read to page 8. I'm an idiot.

Well, Wodin and a few others posted the set bonuses already in the Tier 3 thread.

Pally
Ring: 16int/sta 37healing 6mana/5
2: Judgement of Light heals for an additional 20 points
4: -12m on LoH
6: Flash of Light and Holy Light have a chance to imbue your target with Holy Power(no idea what that is)
8: Your Cleanse spell heals the target for 100

Mage bonuses:
2: -1m on Evocation
4: Mage Armor gets +35resist vs. school when struck by a spell of that school
6: Damage spells have a chance to proc a +200 damage on next spell(s?)
8: Damage spells have a chance to proc no threat on next spell.
Mage ring is 10int/sta 30dmg 1crit

Druid:Helm: 25sta 31int 20SPI 59healing
2: Rejuv ticks have a chance to restore 60 mana, 8 energy, or 2 rage to the target
4: Mana cost of heals -3%
6: Cast + tick of Regrowth increases target HP by 50, stacks 7 times
8: On Healing Touch crits you regain 30% of the cost of the spell (Wow!!)

Warrior
2: +75dmg on Revenge
4: Taunt/Challenging Shout +5% hit (I'd assume spell hit)
6: 5% chance to hit for Sunder/HS/Revenge/Shield Slam
8: When your health drops below 20%, healing spells cast on you for the next 5s get an additional 160 healing.
Ring: 27sta 1dodge 10def



Shaman
Gloves: 21sta 28int 35healing 6mana/5
2: -12% on totem cost
4: +25% mana gained by mana spring
6: Healing Wave/LHW have a chance to proc Totemic Power on the target(no clue), similar to paladin's set bonus
8: Lightning Shield also gives 15mana/5

Rogue (Already posted Helm)
(2): Your normal melee swings have a chance to Invigorate you, healing you for 90 to 110.
(4): Your Backstab, Sinister Strike, and Hemmorrhage critical hits cause you to regain 5 energy.
(6): Reduces the threat from your Backstab, Sinister Strike, Hemmorrhage and Eviscerate abilities.
(Cool: Your Eviscerate has a chance per combo point to reveal a flaw in your opponent's armor, granting a 100% critical hit chance for your next Backstab, Sinister Strike, or Hemmorrhage.

Warlocks:
2: -10s on CoDoom
4: shadowbolts cause vampirism(healing for 270-330)
6: 50% less threat on crits (Old Mage Talent)
8: 12% health cost redux on lifetap

Priest set bonuses:
2 pc: Reduced mana cost of Renew by 12%
4 pc: On Greater Heal critical hits, your target will gain Armor of Faith, absorbing up to 500 damage
6 pc: Reduces the threat from your healing spells
8 pc: Each spell you cast can trigger an Epiphany, increasing your mana regeneration by 24 for 30 sec.

Hunter
8: Pet dies you get a buff :)

RE Rogue Set Bonuses -

Assuming these are true (though they do look a bit too good...)

I think its important to remember that the 2 piece is likely to have a poor proc rate (remember how good the Bloodfang 8 piece looked at first glance) which means the set is not as IMBA as it sounds.

The 8 piece also may be only a slight chance per CP to have the next BS/SS/Hemo 100% crit affect, although I feel that it is more than likely a high proc rate as Blizz attempts to buff the use of Evisc.

Blizz clearly sees the problems with Evisc at least - the 5 piece DD bonus and this 8 piece are both clear attempts to give it more use.

This would also seems to confine rogues to using daggers in raids, especially combat dagger builds.

More BS than SS crits = more energy regen with the 4 piece bonus.

However this may be counterbalanced however by the greater CP generation of sword builds leading to more eviscerates and so more 8 piece procs, although again this depends on the proc rate.

Maybe SF Dagger will be a good compromise between the two extremes? *shrug* It will be interesting to see how this plays out.