Really interesting social bookmarking - Makes research both fun and powerful.... could this be a way of integrating social media with sharing your browsing experience.
we've used it for market research when working as a team - very useful!!
Sadly a Flash only product which has me back tracking a bit....
Here's an example of how we're exploring what is possible for client promotion:
The requirement for Flash will limit our usage of Pearltrees - A great idea but ultimately the victim of the Apple adobe strife?