Anybody know of XM tech is available in Canada? Somehow, I doubt it because of the stupid CRTC regulations.
From what I know, all XM tech is US only. I could be wrong though.
And dbt1949, here's what I had to do to get my Sirius setup:
You buy the base station for $100. Then, you'll need either a car adaptor ($50) OR a boombox like device ($50). If you want, you can get both. Obviously one is for the car while the other is for other uses.

From there, it's a subscription based service. Sirius charges $12.95 a month, or you can get a year subscription for I think $120. It's something like that.
Sirius radio
http://www.sirius.com offers (for free upon subscription) a web based version of their stations. Useful if you didn't purchase the boombox device. Also, because of this, you can sign up for a free 3 day test run of all of their stations. If you're curious, go visit their site.
The advantages of XM radio - no commercials, EVER. Short of the occasional 'Station ID', you'll never hear anything short of music. Unless you tune into one of those talk stations anyway.
All music all the time, and it's available no matter where you drive in the US. A very nice item if you drive lots every day.