milosevic - 2:15 pm on Sep 30, 2010 (gmt 0)

For me, I think this depends on what Google and Facebook are in the future.

Presuming they don't branch out and compete directly in each other's markets (which I think actually will happen and will make this much harder to predict), FB remaining a social network and Google a search engine, I don't think there's any realistic chance for this.

It will require a major shift in the way people think of and use social networks that I just can't see happening.