Kotaku's got the latest official Sony survey for their Playstation Underground members posted, & it looks like the PS3 will indeed do 1080p & have a blu-ray drive.

"Sony is surveying their Playstation Underground members about their feelings on HDTV use and importance. The questions are telling, but most importantly, they seem to verify that the Playstation 3 will indeed have a BlueRay DVD player built into it and that the games will support 1080p."