Always wandered if F1CE ended up supporting this feature (because there was so much hype about it). It seems a waste as every game could make use of PSP intergration as an addition screen for something, abit like the Dreamcasts VMU.
I would love to see you be able to use the PSP as the dash to display the dials when in bumper view playing GT5... that would be amazing!
This wouldn't have really worked, you would've had to put it on top of your TV or something for it to even be possible. (i wouldn't look down on my lap or on the floor/table to see what's behind me )
EDIT: Robin's idea sounds good, but a similar problem, i would try and put it below my TV or something and then it would be too small.
I wish you could use the PSP for something extra such as dash as robin said. I got a bit excited when I heard rumours it could be used as a rear vision mirror.
robin had exactly what idea i wanted. pretty much you can have your gauges on it, and then whenever you want you can use it to tune the car in-race... like the DFGT