MMO Experiement of XKCD's 1110
The folks at PubNub have hosted a MMO World based on XKCD’s Comic 1110 masterpiece titled “Click and Drag” (which would be a 1 terra-pixel image w/o blanks removed)
This canvas based game lets you fly around the world, and is based on the work of n01se, which is a Node.js and websocket powered version.
PubNub has a write-up on the game