This is something I had thought of a while back, but with a couple of recent news articles I've been thinking of it again.

PSP Hack Turns Your Handheld Into a 2nd Computer Screen
4.3 Inch WVGA Monitor Can Run on USB Juice Alone

This would be an awesome way to put an old 770 to use. Touchscreen would be a bonus, but even just a passive display would be nice. Anybody have any ideas if this is even possible? If so, is there anyone willing to attempt it?