It happened to me too. Going to http://www.macosx.com took me to the mail login page (http://www.macosx.com/src/login.php). Couldn't get on from this morning until now (although I didn't try in the last hour so anywhere from an hour ago to now).
Probably a DNS problem. Trying to go to http://www.macosx.com/forums/ (or any bookmarks to posts I have) brought me to a page from the server saying the page didn't exist....
Scott has been doing some maintainence work on the server and the back end of the site - you might have noticed it down for brief periods at nite. this might be effecting your dns lookup. i know i've had strange issues with 'last posts' being out of sync at certain times. i'm pretty sure this will all go back to normal when he is done.
Scott's been doing a lot of stuff to the site, I've gotten repeated connection failures, at night and at other times, and MySQL database error pages as well. I think it's stabilized now, though apparently we'll see a new look when Panther comes out, which he may have to iron a bit.