I know there is the Tuesday Update thread - I can even read it when I'm not signed in.
I'm having the same problem that 'B.A. Harpy Phipps' reported on that thread. Interestingly, I can view newly created threads, just not the old ones. (When I'm logged in, when I'm not logged is I can access everything...)
Sorry for the repeat thread, but I since I couldn't post in the Tuesday Update thread I couldn't report the problem there.