in reply to The most useless key on my keyboard is:
Don't think I've every used the Pause/Break key. So that gets my vote. I use Prt Sc sometimes, what's Sys Rq do? I'm guessing it stands for System Request, or some such.
I miss the Amiga keys. If someone makes a laptop with Amiga keys instead of the Win ones (and without those bloody useless "multimedia" buttons), I'm trading mine in.