Yes, you'll be able to use XM using the AUX jack..

but by November of 2007, XM and Sirius are hoping to have fully "merged" .

How do i know this?

Because I just renewed my subscription to XM for 4 of my XM radios, and they said that I shouldn't go out and buy sirius radios just yet...

just wait until the merge...

 

Thanks - Great news!

 

I take it this solution only works for '07, not anything earlier. I have an '06 and there's not AUX input in the center console. Now what?

 

I had Sirius installed by the dealer even though I have 2 XM receivers, one in my office and the Polk unit in my main HT rig at home.
I went with Sirius because it's a direct connection and sounds better that the XM portables and it works with the stock Shaker controls.

I like XM better for some things. Sirius has 2 Canadian channels that I like.
A mixed bag IMHO.