Re: Sun optical mice, circa 1985
"Isn't there a handwriting capture/mouse pen that uses paper printed with a very fine grid for a similar reason?"
Yep. It's called Livescribe. Or at least the one I've got is. From the little usage I've put it to, it works perfectly. Unfortunately it didnt exist when I was at uni (where I might have actually put it to good use), and I dont really have a day to day use for it anymore. But it works great.