I have in the right hand sidebar, a little button called Xobni. Click it and register! They are looking for beta testers, and if I can get a few people to click through my button and register, then I get moved to the top of the queue!
What is it? It’s an Outlook add on (more email clients coming soon apparantly) which will search the web for as much data as can be found for the emails in your contact list. An excellent idea, if you ask me!