Some of these seem interesting.

Those would be amazing for projectors, I wonder how much they go for? Probably expensive.

Edit: 338 for the 5", not too bad if you throw in the controller, but still a little steep. Would make a decent resolution portable projector.

3.5" @ 640x480 for $289

http://avionicslcd.com/3_5_vga_lcd/3_5_inch_vga_lcd.htm