I've got a week 29 MacBook that so far has been trouble free. It was upgraded at the store to 2 GB, and I upgraded it to a 160 GB HD. So far none of the known MacBook issues have surfaced.
I frequently leave it running and usually only shut it down every few days. Last night I shut it down, and this morning when I hit the Power button all that happened was the screen "sort of" lit, like the backlight came on (the apple was lit on the cover), the Superdrive made a little bit of noise, then nothing. Shut it down, waited a bit, tried it again, same thing. Popped the battery out for a while, didn't help.
So I did the old zapping of the pram, and it came back to life. I've had it about a month and have not done that, I've updated the software and made sure the daily, weekly and monthly utilities have run.
This may have been a one time glitch, maybe after all that had been done to this machine a reset of the pram was a good idea. But since the MacBook is still in it's infancy I thought I would post my experiences in hopes that maybe it would help a fellow MacBook owner...