i would rly like to think Rift will be a huge sucess as well, with 1344 defirent class/spec combos (not to mention the defirence you can make in all talent trees, giving almost endless options)
but... i also thought AION was going to be huge, as did many people. but now, manny month later, its not anything worth talking about
im going to try RIFT before i can say if its good or not, and not pre-order like i did with AION.
and yes, 1344 is the amount of avaible class/specs. 4 classes, each have 8 talent trees, you can make a spec that combines 3 defirent talent trees.
8 (talent trees to start with), x 7 (numbers of talent trees to choose next) x 6 ( 6 left to choose from, as you can't have 2 of the same), x 4 (amount of classes)
8 x 7 x 6 x 4 = 1344.... a lot more than in WoW