OK, so I’m not a fan of the C64 (Spectrums FTW and all that), but this looks most ace. Jason Winters has taken one of them C64-in-a-controller things, added a mini keyboard from a PDA and a screen from a PSone, and bolted them all together to make a mini C64 compatible laptop, complete with joystick port and SD card slot for loading software.
Jason Winters’ Pico-Projects: The Picodore 64 – a Commodore 64 PDA