Enter Storybricks, a new concept from Namaste Entertainment that eschews the big boys' affinity for tacking single-player narratives onto a traditional MMO foundation in favor of player-generated content. Storybricks is more tool than game at this point, and a new post at Kill Ten Rats sheds a bit of light on what makes the software unique. Ravious describes Storybricks as an offshoot of tabletop roleplaying, and as such, a concept that linear gaming and conventional MMO fans may not embrace.
It's an interesting read, and it features commentary from developer Brian Green and community manager Kelly Heckman. You can read more about Storybricks via Massively's hands-on impressions piece from this year's GenCon.