20GB bought at launch. Basically the PS3 shuts itself off.. Yellow for a brief second then to red flashing lights. I waited a bit and was able to get solid blue for a little while and eject the movie but then back to the red lights. I had just played a few games of NBA 09 Inside fine as well.
I've used the hell out of my PS3 (hundreds of movie viewings, tons of gaming, music, slide shows, etc) so I'm not really super surprised but I am bummed that I'll have to wait to play games and watch movies.