Bugger. Yeah i also read somewhere that you can do a PRAM reset or something and it helps, but general concensus is that its a bad run related to hardware. Seems to affect a batch of people who got them within a week of release or so.. Are they sending you a replacement straight away or do you have to send yours back first?
I'm going to try some things out over the weekend, and if they don't work, call on Monday. I'll be asking to keep it until the replacement is sent, as this is my only PC and I need it for work.