[Update: we now have an official feed for the main PDC event page, in addition to the community/blog feed below]
The Microsoft Communities team was kind enough to create a special category for MSDN blog posts relating to PDC 2005. If you want to keep an eye on MSDN bloggers talking about PDC, subscribe to:
It's tempting to try to parse all those parameters and trim the URL down (and get rid of things like CultureCode), but I'm not sure what's required and what isn't. I got this URL by going to http://www.microsoft.com/communities/blogs/PortalHome.mspx, searching for individual posts in the category "Microsoft Professional Developers Conference", and then clicking the RSS icon on the results page.
And yes, I can see that the result set is a little cluttered, I will ask owners of un-related posts to re-categorize their feeds so that they don't get aggregated up here. If you're a MS employee with a blog on MSDN, you can control which posts show up in the PDC feed by using the appropriately named "Microsoft.com Communites Blog Registration" tool. For my blog, I created my own category feed for PDC related content (http://blogs.msdn.com/jmazner/category/9767.aspx/rss), and then I used the reg tool to link that feed to the public "Microsoft Professional Develpers Conference" feed.