The Space Hijackers' Twitter account for their Official Protesters of the London 2012 Games has been suspended, following a complaint from the London Olympic committee:
Twitter. That harbour of free speech, undaunted by various Arab dictators. However, it seems that a quick word from LOCOG, the unelected body in charge of the 2012 Olympic Games, is enough to encourage Twitter to suspend our account. Apparently there's a danger people might think we're part of the Olympic delivery team. We're sorry if you were enjoying our tweets, we hope to be back up and running again, as soon as Twitter gets the joke. In the meantime, you might want to look at this website to get some background...
Twitter actually has a pretty clear policy on this: parody and protest accounts just have to have some indicator that they aren't the official item (e.g. "FakeCoke" or "CokeSucks" but not "OfficialCoke"). My guess is that Twitter's suspension of the account was on that basis. If so, it should be pretty straightforward to get it back up and running.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.