Thought I'd post my experience with my new MacBook 2.0. Picked it up yesterday on Craigslist new and sealed in the box. No receipt. When I booted it I noticed a dark spot on the screen. I originally thought it was dead or stuck pixels but upon closer examination it appeared to be dust. I was immediately worried as I couldn't return it to the seller on Craigslist so I took it to my local Apple Store. Even with no receipt they looked it up by serial number. They looked at the screen and immediately gave me a new one saying it was dust under the screen. I was amazed and pleased to say the least with the service and result.