[sradnidge]

Microsoft might though, would certainly be more relevant than the amorphous live.com.

[uptown]

I agree with your guess. This kind of thing seems right up Microsoft's alley. They used to have an entire campaign using the phrase: "Welcome to the Social". If one of the big players goes in, I'm guessing Microsoft.

[chrislomax]

It wouldn't be unheard of for Microsoft to rebrand it again. They have already rebranded it 3 times!

[ignifero]

Microsoft Live Social Network, very catchy

[chrislomax]

Microsoft Bing Hotmail Live Social Network Simulator

[shrikant]

Would definitely be interesting, given that they do live.com, docs.com, and office.com.

(is there something else that I'm missing out on..?)