gerver, I had Best Buy do the original install on the XM Commander a few months ago. As for connecting the Commander to the AAI-NIS, I just used a set of RCA cables, connected the two and shoved everything back into the dash. The sound quality is a huge improvement from the FM modulator. I think the bass has the greatest improvement.

I just got the Monster iCarCharger for my ipod and I'm using the powerpoint that is in the center console/armrest. The adapter has a low enough profile where it can be plugged in and the armrest can be closed at the same time. I fed the cable right next to the latch where the armrest clicks shut. There is plenty of room for the cable and it shuts completely.