A serendipity engine! Rated 5 out of 5 stars

This is a pretty amazing tool with its ability to discover and connect bits of information about a subject from a multitude of different social networking sites. The part I like best, though, is the personalization and the resultant discoveries that pop up unexpectedly about things that matter to me. Like when I was presented by headup with a video of an overseas friend I haven't seen in years, giving a lecture at a conference I never even knew he'd attended...

This review is for a previous version of the add-on (0.9.92.5555).