I first heard about Plaxo many moons ago from my friend Mike; at that time however, it was PC only so I forgot all about it. It is now available for Mac and it's works really pretty well. You sign up, install the plaxo agent and away you go - it connects neatly into the Address Book application and makes sure that the details of any of your contacts who also use Plaxo are up to date. Easy and useful.

SteamSHIFT out.