[tjoozeylabs]

How are you going to move ~400 million people to a new social network?

[sstrudeau]

How many people used AIM at its peak? How many use it now vs. Skype / GTalk / etc.? Watching the shifting sands of Friendster / Orkut / MySpace / Facebook has made me believe that Facebook's hold on its currently vast user-base will always be tenuous. It will never be entirely irrelevant (same can be said for AOL) but has no guarantee that it will continue to dominate.

[zaphar]

One social circle at a time.

[nkohari]

Ask MySpace and Friendster.

[calcnerd256]

one foot in each

I use facebook and Orkut. Sure, I use one more than the other, but there's possibility for that to shift because I'm free to use both.

[volida]

hey, that's a billion dollar question