No, I can't get to the Wizards d20 site either. And the Officially Released stuff on opengaminigfoundation.org just links to the RTF files on the Wizards site. Darkness, maybe you still have the files in cache from the last time you accessed them?
The d20 stuff has been offline since the Wizards site went down, and hasn't come back up since. It just goes to show the level of support that Wizards has been showing d20 lately. It takes YEARS for content to be released, even unofficially, and when it does, it takes forever for the website to be updated to address the changes. The site's been down for a week, and either they haven't noticed, or just don't care. They just don't seem to have any manpower at all working on d20.
Guess this is a rant for another forum, though...