You'll be happy to know, I found out the answer to the problem. First, you can use a simple double-male-end wire that has the standard mini headphone sized jack on each end. Radio Shack; about $6 or so. Looks like this:
http://www.radioshack.com/product/in...entPage=search
The Radio Shack brand is cheaper. I recommend the 6' length one.
Now for the answer...
The Aux In only works with using the FM Transmitter. So if you have your radio wired to play through the Aux Out as I do, you still need to use the FM transmitter from the satellite radio to hear your auxilary device.
Basically I leave the wire plugged in all the time and set one of my head unit radio presets to the FM transmitter channel and just flip to that when I want to use the iPod. It doesn't sound bad, but I do have to crank up the volume on the iPod pretty much all the way.
Here is where I finally found out the answer:
http://www.xmfan.com/viewtopic.php?t...=asc&highlight