According to Anonymous’ twitter feed they have taken down CBS’ website, cbs.com. This doesn’t look like a typical DDoS though; it looks like they’ve gained access to their servers. Rather than being unresponsive it seems CBS’ website simply shows a directory listing, which seems pretty empty.
There hasn’t been a reason given so far but I’m pretty sure it’s safe to assume this is in retaliation for Megaupload; why they’ve been targeted is not immediately clear but I’m going to assume they were in favour of Megaupload being taken offline. Naturally, I imagine Megaupload served thousands of episodes of CBS’ shows.
Although it’s only been down for a few minutes people are already showing their frustration on Twitter.
Update: It looks like the site is back up now, UniversalMusic.com is currently being targeted and seems to be intermittently down.