Oooh, maybe I can get one of these for Christmas (next year):

FastMac: SuperDrive 8x for PowerBook G4 667 MHz or Higher

They have SuperDrive upgrades for a bunch of other computers too, like iBooks, Cubes, iMacs, etc.

Actually, I'm not sure there's much point in having a DVD-burner without having a digital camcorder. What would I burn without having interesting digital content? I think I'll keep an eye on specials for digital camcorders this Boxing Day.