Picked up an Ai-Net compatible Sirius tuner this weekend and installed it. Chose the glove box location because I put my antenna inside the cab in the center speaker location, and it also works well with the placement of my Kca-420i Ipod adapter which is mounted on the drivers side inside the dash. The glove box is two piece, making it possible to remove the top cover from the face and use all 6 mounting screws and run the wires through the back of the glove box.
I haven't been at all interested in Satellite radio until now, because I mostly listen to AM radio and my Ipod; but I'm an old school BTLS fan from years past. I had a little signal fade today, which I don't think is related to antenna placement, more so from trees and obstructions. I was worried about the pass-through from the kca-420i, but it works flawlessly. It was good insight by Sirius to make an Ai-Net input on the tuner box.