I was actually planning on having the mouse be a separate glove, because unless I want to do some hardcore multiplexing, it'd be a real pain to have both keyboard and mouse signals going over the same USB channel. (Yes, it's a USB keyboard. I laughed like a little girl when I got it working -- I've never been more excited to see the letter 'w' appear in a terminal window in my entire life.)

But yeah, I already have a couple of 2-axis accelerometers and an ATTiny that I think will work just fine for a mouse. (Unless you can think of a reason why I'd need or want a 3-axis accelerometer. 2-axis seems simpler, and it's a tiny little chip -- the ones I have are SMD.)

I haven't looked at the Twiddler keymap yet, but will have a look at it; I'm sure there are several options.