DarkSEOTeam appears to have hacked Matt Cutts blog. Of course, it being April Fool's Day, it's possible that Matt himself did this as an April Fool's joke, but it may also be DarkSEOTeam's way of playing a joke on Matt. Here's a screenshot of just part of the hacked page.
There's lots of pretty funny April Fools jokes going around today. I tried to get creative over the last few days, but the lack of nicotine in my body (I quit smoking) sent me for a major loop, and creativity was nowhere to be found. Ah well, maybe next year I'll come up with something fun.