Four months after announcing the features, Microsoft (NSDQ: MSFT) added social networking and music radio functionality to its Xbox 360 console on Tuesday, along with the first European foray for its Zune brand (see earlier reports from Tameka and I). Here are my initial explorations with each new service (turn up the volume)...

Last.fm verdict: Slick player presentation and Last.fm experience, good for parties but no on-demand, may have ads…

Zune verdict: Just an updated Video Marketplace with “Zune” badge…

Twitter verdict: Cute implementation for reading, initial bugs, keypad is a must…

Facebook verdict: Especially nice photo slideshows, typing a real pain…

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