Using HyperRam & HyperFlash with P2
Parallax sells a board with a HyperRam and a HyperFlash chip on it that mates with the Eval Board
Product home page
Documentation
Datasheet for HyperRam
Datasheet for HyperFlash
I've use these as frame buffers to store images to display over VGA/HDMI
The original development posts are here