The surprising thing is that Beck isn't suing the website for defamation of character; he's suing it for violating his trademark. This is probably so that the lawsuit can remain business-y and not involve Beck's personal life (or the satire laws that protect entertainment sites), but it seems like a risky way to go.
The website was down earlier, but seems to be functioning now. Just to be safe, they've also registered the websites GB1990 and Did Glenn Beck Rape and Murder a Girl in 1990. Things are going to get awful messy around here.