Not too concerned about the derivative nature of the features - any sort of "truly" original idea is so rare, they almost never occur. And with 6billion+ people on this rock we call home, that's a lot of competition (edit: for original ideas!). More interested about the concept of the achievement room itself. I can see some merit in the concept of globally rewarding players for doing cool things in a game (and then allowing other players to see these rewards).
Gesta Non Verba
Nocturnal is helping companies get cheaper game ratings in Australia:
Wii code: 2263 4706 2910 1099