It's been a while since I've talked about identity online (although get me going with a few beer offline!). I think the only other recent discussions I've had around identity is on the Citizen Garden podcast in early January.
What's important here is that identity, in general, is pretty complicated and it's interesting, to me, what people are talking about regarding technical solutions. I don't think complexity is the answer, either, though. I don't think reputation and identity should be tightly bound, although, I do think my whuffie (which includes reputation) has a great deal to do with why my identity is important. But that's a discussion for another day.