From Wikipedia:
Folding@home (also known as FAH or F@H) is a distributed computing project designed to perform computationally intensive simulations of protein folding and other molecular dynamics simulations. It was launched on October 1, 2000, and is currently managed by the Pande Group, within Stanford University's Chemistry department
October 2007 is the release date. GT5 Prologue is essentially a demo of Gran Turismo 5. The game will run in 1080p@60fps and will feature online multiplayer, garages, and integration into Home. No news yet on how many cars/tracks will be available.
Not only can you create your own levels, but you can edit levels while you're actually playing them. Little Big Planet uses a fine-tuned physics system and an array of customization options to design all kinds of worlds.