Well, I don't know about web 2.0 styling; we do use some elements, but very subtly. But, web 2.0 as an UI springboard (springboard was the codename for that year), is very apparent. We used AJAX to read several RSS feeds and have them displayed on the top.
http://www.roboticks408.com
(Our site is configured for a robotics competition called BEST a couple of years ago, it will be updated for the 2007 season).
As for teams wanting to go into web 2.0 styling, it would be tough. Generally, web 2.0 (take Flickr for example) isn't... well, FIRST. It's very plain, very "contrasty." FIRST websites usually are very graphically involved and very un-2.0. If some team can create a web2.0 inspired site (like FIRSTr), maintaining a FIRST identity and web 2.0 identity, it should be very interesting and do very well in competition. I happen to like the design of FIRSTr very much, and as someone stated earlier, its very fun and easy to use. There is no reason why 2.0 styling shouldn't be used (except that it's conventionally used for social sites), it would just take a lot of work make the balance of FIRST and 2.0.
http://firstr.org/