In a far sense it's a online version of cadavre exquis (exquisite corpse). Based on an old parlor game, it was played by several people, each of whom would write a phrase on a sheet of paper, fold the paper to conceal part of it, and pass it on to the next player for his contribution.
SwarmSketch is an ongoing online canvas that explores the possibilities of distributed design by the users. The site generates randomly a popular search term which becomes the sketch subject for the week. The collective is sketching what the collective thought was important last week. A new sketch begins after one week, or after the previous sketch reaches one thousand lines, whichever comes first.
It's fun and "borg" at the same time.