Guys, I just wanted to pass along a site that we've just launched: www.ingamenow.com. The site is best described as Twitter for sports and sporting events. Users can interact over teams, players and games - most notable, they can receive real-time scores and banter through Gtalk, AOL Instant Messenger and email.
The front-end is Tapestry 5 making use of a few of the AJAX features. I believe strongly that using T5 sped the development immensely and all members of the teams are converts now. The rest of the architecture is Spring + Hibernate. Thanks to Howard and everyone who has helped make Tapestry what it is today! Danny