Most of the bloggers I read who were at WEB 2.0 have already blogged about JotSpot. I wasn't at WEB 2.0 but now it's my turn.
In short, I'm very excited about JotSpot which is a web development platform built on top of a wiki engine. As you may have guess already, I'm a big fan of wikis. I've also long been interested in placing real-time structured data in documents (it's one of the things that excited me about SGML in the first place).
I almost think of JotSpot as a team version of where I want to go with Leonardo. And whereas I'm focused largely on personal info hosting/publishing in Leonardo, JotSpot looks like it could be a great platform for building aggregators.
Beyond the information that's available at JotSpot you might want to check out Jon Udell's flash demo of JotSpot which made me feel like I was getting my own personal demo from JotSpot's co-founders.
I'd already been following Joe Kraus's blog, Bnoopy before JotSpot was announced. I hope he can find the time to get back to blogging more soon.
I just got in the beta program so I'll report more on JotSpot in the future.
There may be broken links to media on this page. I'm still in the process of migrating them over.