Macbook Pro woes - ideas on what the problem is?

[Stephanie]

Ok - I took it to the Apple Store tonight. Yeah, I could have done more work to diagnose it myself (and taken out the RAM, etc.), but the store happens to be close to a restaurant I wanted to go to...and I felt like celebrating tonight (hence wanting to go to the restaurant). So, I figured, ok, I'll make an appointment, find out what's wrong & go from there.

Thanks to all who said bad RAM. It was. 5 minutes for them to diagnose it. I'm certainly glad it was just RAM, as opposed to another bad logic board.