Sure enough, Facebook, Twitter and MySpace are the world's biggest social networks but also there are some very country specific social networks which are not less successful; and the biggest one in Germany, the VZnet representing studiVZ, meinVZ and schülerVZ, has finally received its own Windows Phone 7 client. The new Windows Phone 7 VZnet app features the VZnet typical services like wall postings, birthdays of your friends, VZnet's "new radio messages" as well as who knows whom, photo albums, latest visitors, sending and receiving messages, viewing friends profiles and own friends lists as well as "Gruscheln" (something very VZnet specific)!
The Windows Phone 7 VZnet client for Windows Phone 7 is now available free of charge from the Zune Marketplace. However, since the VZnet is focused on Germany, it's only available in German.
Cheers ~ Arne