This is a super open-source side-scrolling mmorpg for the PS3.
You can get online and play a variety of levels that users have created right down to each interactive and functional object.
Everything is user definable: characters, sound effects, backgrounds, you name it.
I personally really liked this kitschy halloween level.
check it out... the geek site - www.littlebigplanet.com
the commercial site http://littlebigplanet.com
I really like that you can put your own background music tracks in the game.
LBP is to gameplay what the Wii was to hardware.
It will be interesting to see what the next generation brings :)