A compilation video was just published of the 83 flash mobs that occured simultaneously around the globe this year on November 10th. Huge props go out to PabloMac for putting this together.
[youtube:http://www.youtube.com/watch?v=P9rd0xLH-YI]
Don't know what the heck Geocaching or a WWFM are? Head on over to Podcacher.com to find out.