I just reinstalled Plaxo for Outlook 2007. A great tool which I used to use for Outlook 2003, but initially I had some problems running the integration on Vista with Outlook 2007. A couple of versions down the line these problems appear to be solved and my address book now synchronizes quite smoothly with my Plaxo account. The great thing about Plaxo is that it will automatically update all the contact info of my friends and contacts as soon as they make a change in their info, assuming ofcourse that they also run Plaxo.

To join the social network frenzy there is now also something called 'Plaxo Pulse' a kind of Facebook like way of keeping track what your friends and contacts are doing. It's interesting and since I upgraded to the latest version of Plaxo I seem to automatically be on Pulse. So I'll give it a try and see how it compares to Facebook.

As far as I can tell there is no Pulse API available yet. Although several parts of Plaxo are accessible through the Plaxo developer API. Personally I believe the Open Facebook API to be a great part of Facebooks succes.