Updated: For a comprehensive list of new features, along with links to the original source, check out my new article about WSS v3.0 features. Thanks, Gene, for compiling this exhaustive list!
Some people have written in to Gene Kraybill and to me wondering “where did you get that information about WSS v3? Aren't you under NDA?” Well, of course, I am under NDA, just like every other MVP and beta tester out there. Microsoft recently released testers from their NDAs as that NDA pertains to the client-side applications of Office 2007, but the NDA still stands on server products. So I can't talk about something that isn't already public (so don't even ask!). Lucky for Gene and me, there's a HUGE body of information about WSS v3 that IS public. Just waiting for you to read! It may seem like the SharePoint Show interview was revelatory, but when it gets down to it, we basically paraphrased existing material (of course, my commentary on Outlook 2007 was my own, but hey, that's allowed now. Who doesn't love Outlook 2007, I ask!). If you want the REAL dirt on what's coming, you can refer to my post on the subject (made over six months ago, during PDC) -- this post contains just about everything mentioned in the interview. There were a few bits of new news in that interview, so rather than leave you guessing, here's a link to the original sources. Gene has the exhaustive list (with links!) on the SharePoint Show site, this is just a summary of the sources.
PDC 2005, Arpan Shah, David Gainer, Channel 9 (Robert Scoble's video interview with PJ Hough and company), Maurice Prather, Mike Fitz, MS Press Pass, MS article on ECM, PJ Hough, the SharePoint Team Blog, and Tudor Toma.
If you're not reading those sites, you're missing out! My interview with Gene was only a brief recap of the stories on these sites. For the REAL meat of the matter, go directly to the source. Don't bookmark this for later, do it now. There's so much information out there for you to read, so much to learn! When you're done, come back here and talk about the features that are most exciting to you! Personally, I'm excited about the navigation enhancements in WSS v3. That, and the fact that all lists and libraries have event handlers. What new feature makes you excited to upgrade? (Be aware: If you're going to comment on a feature, and the source isn't obvious, quote it. We take NDAs seriously around here, we've already asked bloggers to remove posts that were covered under NDA).