PsychoZ -
I have one.
I ran hot and ground from battery through a switch to a power recptical. The power receptical I use for plugging in my cell phone or my 12 to 110 adapter to power my video camera.
I also have another wire I ran from the battery to my handle bars that is curently terminated, I am going to use that for the same thing you said, powering my GPS, IPAQ etc.
I will be seeing you at Street vibrations so you can check out what I have then if you can wait..
I dont have any pictures and there really isnt anything to take a picture of. I probably should have put an inline fuse somewere, but I didnt...