My BlackBook just died tonight as well. I just got it less than a week ago at Best Buy. It was open box, I should have known better but the cheapscate in me spoke louder. Lesson learned.
I was installing software and suddenly the screen went dark, the DVD drive spun up once or twice but then all I could hear was the moo of the fans turning on and off, on and off. I managed to boot it a couple of times after that, but every time it would die after about 5 minutes. Then it just sat there, pressing the power button would flash the screen, the power light would start blinking, but nothing else would happen.
I still had a CD in there too, and couldn't eject it, none of the methods worked. Finally I came across this post on a blog:
http://silvermac.com/blog/2006/dvd-stuck-in-macbook-pro/ It worked like a charm and the CD ejected. However, the MacBook still won't start.
I've currently got the drive hooked up to an external SATA casing I have, and I'm imaging the contents onto my other external drive (amazing how much stuff you can accumulate on a drive in a week). Once that's done I'm popping it back in and heading to Best Buy to see what they're going to do for me (don't have high hopes).
I must say, this is very disappointing.
iBook G4 / DeadBook (Black) Mac OS X (10.4.7)