TWRoO on 11 May 2012
It seems likely Nintendo will do something like this eventually, whether at Wii U launch I don't know.
Ultimately it would have to be a much better system than the current achievements/trophies on the HD twins for me to care though, ie there would actually have to be some tangible reward for collecting them other than an online ego booster (perhaps unlockable mini games related to the games in question)
