We role play!  Instead of sitting around a table and gaming face to face, we use the written word to tell our stories.  It's similar to a pbem or a pbp, but the collaboration method is more streamlined and makes for easier to read stories.  At NextGen RPG, we store each active game file and allow the users and GMs to edit the same document as they tell their story.  Think of it as a living, breathing compile, that lends itself to telling one cohesive story, without sprouting multiple story lines or timelines that are impossible to edit later into one smooth compilation.