http://www.playxpert.com/web/guest/homeIt's like the community overlay, but (hopefully) better.
I haven't tried it yet, but here's some features:
Chat
Music
Web Browser
Diagnostics (in-game task manager!)
Plenty of other "widgets" to add.
Try it out!
Edit:Rawr! doesn't work on 64-bit systems. Any 32bitters want to try it out and let us know how it is?