It’s hard to find information on web 2.0 that isn’t highly polarized or self-serving. One great resource, currently my favorite, is programmableweb.com. Unlike other sources John Musser, the industry veteran running the site, reports on what’s happening with a focus on what’s being built rather than what’s being said. His references page is the best one stop shop I know for people playing catchup (or are trapped in acronym hell) and his mashup list will keep you occupied for hours. Highly recommended.

Also of note: The Web 2.0 working group.