Rentahamster
Rodent Whores
Kripp's idea of champion levels is like merit points in Final Fantasy 11, which is actually something that I suggested back in beta, because I had a feeling that things were going to end up like they are now with nothing to do in endgame due to Inferno not being as hard as it was supposed to be.
The champion level reset ladder idea, however, is pretty innovative, and I really like that idea.
Athene's idea for hardcore PVP spectator mode, where players can put their reputations and their characters' lives on the line for internet is fucking awesome. If there's anything that players will be willing to sacrifice their expensive gear for, it's internet glory.