Well, my new (probably short-term, as usual) obsession is with programming the Nintendo Gameboy. I ordered a RAM cart and writer from the somewhat shady CD64 folks in Hong Kong. But they're a lot less shady than most of the other places that sell this kind of stuff. (It's supposed to get here in about 2 weeks). In the meantime I've been using an awesome emulator called "rew" to test my creations.
I think my first project (to learn...) will be a freeware clone of Tetris, since I don't have that for my Gameboy. After that I'll try to make something original. =)