Another instinct I have is that many of those with experience participating in these social networks have come to orkut with baggage from previous experiences in tow, or have not come at all. They sound tired of these kinds of places. I think I understand why--because they've had their love affair with the idea, and it wasn't, shall we say, very satisfying.
On the other hand, lots of us who never caught the early hook-up bug from social networks have signed onto orkut with not much baggage (and maybe even fewer expectations).
Something to be said, maybe, for not giving up your social software innocence to early? ;-)
