The problem with the gumstix as a terminal is that nobody has yet been able to figure why its USB doesn't work, so though you can get video, it's hard to provide mouse and keyboard. Plus Gumstix still don't seem to be selling the aluminum case, so it's a bit delicate to lug around the world with you.
The Guruplug Display, on the other hand, isn't an OMAP SoC, comes with a case, has working USB, and simple 2D video seems to be documented adequately (or nearly so). I don't have anything further to report yet, but work is ongoing.
