I have been following for months the evolution of this project entitled "Fruux" and driven by our German friends at http://blog.fruux.net/. AS originally stated, all good story starts with a good idea:
I continue to think that the address book is one of the great untapped Web 2.0 opportunities, […] and certainly more than an outside-in, invitation-driven "social networking application" represents my real social network.
Tim O’Reilly, 2007-09-27
A true "social networking application" allowing you, at home or one the move, to keep track of your contacts at a mouse click. I recommend you to have a look at their blog to learn more about the way Fruux has been developed but also thought from the really beginning as a classical Mac application: make user's life easier.
After Dominik and his colleagues have been working hard for months, time for beta test has finally arrived, and from what is offered today, it looks really promising, being a true alternative for some .Mac services while making most of Sync conflict history.
Additional information for registering and beta testing at: http://twitter.com/fruux