(I still want to write a good blood and guts game some day though, although I suspect the OLPC wouldn't be my target platform!)
The OLPC laptops, which are also called XOs, are neat. They have a built in camera, plus a screen that can be swivelled around, turning the machine into a tablet-mode of sorts. There are Playstation-esque controls on either side of the screen, which complemented the machine nicely, although I do not believe they are working in the game toolkit of choice for the XOs (Pygame). The screens also have a low-power, sunlight-friendly grayscale mode, which I think Reversi will work well in. I'll likely need to do some optimization on the game before it works well in low-poer mode.
The best part of attending this game jam was that it allowed me to develop a game that I normally wouldn't have. Almost all of my programming time these days goes into work, which I don't necessarily see as a bad thing, but it is occasionally nice to be able to work on something with a different set of goals and limitations.