Xobni, the social email plugin for Outlook, which I highlighted previously has finally opened its doors as a public beta. I initially had some private beta invites that went very fast but I continued to receive inquiries. Now you can get your own copy of the latest Xobni product and test it out for yourself. These are also unconfirmed rumors that Microsoft is bidding to acquire Xobni so it would not be far fetched to think that Xobni could be integrated directly into Microsoft Outlook if the rumor becomes reality.