I don't buy the no Rumble/Motion Sensing at the same time thing being a technical issue, I think it's all to do with Sony's legal problems.
Yeah, PS1 games downloadable on PS3. You can download them on PSP, onto a memory stick(Riiiiiiige Racer), why not take that memory stick, pop it into a PS3, play them on PS3....!
Mostly I'm obsessed with what the new startup sound will be.