I guess you all know how Wario Ware works, small minigames completed in the time of 5 seconds. Wario Ware DIY is, apparently, a new game in the series, with the addition for players to create their own minigames. It's been out in Japan since April 2009.
Some "big-name" developers are going to release minigames made for the game (for free, if you have the game) and my eyes immidiately caught up on:
Other developers taking part in this experiment include: Pixel aka Daisuke Amaya (Cave Story), 5th Cell (Scribblenauts), WayForward (A Boy and his Blob), Gaijin Games (the BIT.TRIP series) and Team Meat (Super Meat Boy).
I'm not a big fan of the series but it's going to be neat to see what comes up nevertheless. Only problem is that this is the state of my DS (thanks to my sister). Bliss.