Just in case you guys are looking at your stats and would like to know if you meet requirements here is the usual list :
Warrior
Tank(MT):
12000 Armor, 12000 hp, 490 def., 15-30% Dodge/Parry
DPS:
1700 ap, 70 hit, 33% crit
Druid
Tank:
415 def with 3/3 Survival of the fittest, 12000 hp, 30% Dodge, 20k armor
DPS:
600 dmg, 15% crit (caster form), 75 mp/5, 75 hit
Heal:
+1000 heals, 100 mp/5
Rogue
1300 - 1400 ap, 90 hit, 20% crit
Priest
Heal:
6000+ health, 7500 mana, +1000 healing, 100 mp5
DPS:
6000 mana, +650 dmg, + 3-5% hit
Hunter
BM:
8000 hp, 6000 mana, 1450 ap, 17.5% crit, 75 hit
MM:
8000 hp, 6000 mana, 1750 ap, 17.5% crit 75 hit
Shammy
Resto:
950 - 1000 heals, 110 mp/5, 10% crit
Elemental:
+500 dmg, 20% crit
Enhancement:
1000 - 1200 ap, 20% crit, 8% hit
Mage
+600 dmg, 90 hit, 25% crit, 6000 hp and 7000 mana
Pally
Tank:
102.5% Total avoidance (dodge/parry/block)
490 def, 10500 hp, +100-150 dmg
Heal:
1000-1200 heals, 80-100 mp/5, 8000-9000 mana, 15-20% holy crit
Warlock
Affliction: 7000 hp, 6000 mana, +600 dmg, 90 hit
Destro/Demon: 7000 hp, 6000 mana, +600 dmg, 90 hit, 20% crit
BTW, good luck the instance is fun as hell and a great learning curve for any guild.