Ah, I just came here to post about that.
Some sort of bizzare DNS error? (I wouldn't be able to get to internal pages like this if that was the case, though?)
It's an actual redirect- if you look quickly, before the redirect, there's a page titled "Your Page Title," with the text "Optional page text here." If you press Control + U quickly enough (at least in Firefox), the source code comes up. It is:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
Your Page Title
Optional page text here.
http://lesswrong.com is suddenly redirecting to a Tibetan meditation site. What the hell?