This just arrived in the post (in less than a week, from China):

It's a 320x240 full colour touchscreen, which is connected using SPI (both the screen and the touch thingy). I'm not sure if it'll be fast enough to be usable over SPI (I think it should be able do about 3fps), so I also have one on its way with a parallel interface. Maybe I'll end up with a dual screen setup!