Do you Plaxo?

I met Ahmad Beyranvand at EIBTM and he recommended www.plaxo.com, the online address data repository. I receive these Plaxo update requests from time to time, but had not joined. When I did I was amazed to find that a couple of hundred people in my Outlook were already members and now my Outlook will be automatically updated when they change their details. I agree with Ahmad, this is ingenious. The basic version is free, USD 50 for the premium which has a few more bells and whistles. I am still a novice Plaxo user, but it looks very promising.