search
Get flash to fully experience Pearltrees
http://images.google.com/imghp?hl=en
http://www.exalead.com/search/
old fashioned search
Forum, message board search
same as or similar search
Image search
Real time twits Image and news search
Semantic Search
Username and People Search
music search
clustering search
real web 2.0
Meta Search
Video Clip search