http://be.imba.hu/
It takes your armory snapshot and gives you a summary of what (if) you can improve to be better for PvE. Although talents aren't fully completed its still pretty cool.
Some examples:
http://be.imba.hu/?zone=US&realm=Kal...aracter=Steeve
http://be.imba.hu/?zone=US&realm=Kal...racter=Wiseguy
http://be.imba.hu/?zone=US&realm=Kal...aracter=Dyveko
The gear-o-meter is really useful if your wondering (or if your a gleader looking for recruits) what raid content you should be doing.