I wouldn’t call SL Web 2.0 just yet. Too many hurdles, like the closed nature of the space – I can read a blog post, or a wiki page, or listen to a podcast offline, and without using a big, bandwidth-hungry app. Search and distributed conversation is a staple of Web 2.0, but lags way behind in SL (is there a Technorati for SL objects or conversations?). And the numbers issue plays a role here, too – one reason for the power of the blogosphere and Flickr etc. is that there’s a huge network of folks already there. SL’s network is too small, still; doesn’t scale well; and cf search problem.
SL does have some additional Web 2.0 features, namely microcontent authoring. Setting aside the island business, one can edit an avatar quickly, and make 3d objects fairly easily.

But mostly I’m glad you made it in and out of Chicago in one piece! I spent two hours on Midway’s tarmac last Thursday, while lighting played everywhere.