Very Cool Presentation over at Google Video on "Human Computation":
[kml_flashembed movie="http://video.google.com/googleplayer.swf?docid=-8246463980976635143" width="400" height="326" wmode="transparent" /]

As I understand it, human computation is looking at the human's brain "downtime" (i.e. playing Freecell at work) as "free cycles" which can be utilized for computational tasks too complicated for computers, but easy for humans. Luis von Ahn, the speaker in the Google Video, is an assistant professor in the Computer Science Department at Carnegie Mellon University. He has developed something he calls the "ESP Game", which is a small example of using human computation to develop a better image search website.

Very cool stuff.