I'm at JavaOne next week. I'm glad I decided to post my entry to the Codegeist competition last weekend as it has taken all week to get it to the point that it feels stable. There's a lot more tweaking that can be done to it, but I feel like it's pretty much ready to be judged (javadoc is partially done and I'd like to have more unit tests if possible).
Unfortunately, I haven't gotten much in the way of feedback beyond people who are excited by the idea. I only know of one user who tested it for sure and he only reported one bug. I know there must be more, but I'm not sure how to encourage further testing.
If you want to meet up at JavaOne, I'll be the guy with the backpack. :)