you'll find everything u need on mitch's site. i used his interface and i love it.
fyi - i can't speak for other front ends but Road Runner (in the forums here) has great integration with mitch's Sirius tuner found at the site above.
I finally took the time to get Sirius running in Road Runner, it's so much better than Sat Amp in the car.
AOPEN MINIPC 945 VXR, CORE DUO T2400, 512MB, 120GB, Wlan, CARNETIX CNX-P1900, 1020TSV TFT 10.2" Touchscreen, BU-353 GPS, wlan-antenna, X3 integration to HU, D-link DUB-H7 USB 2.0 Hub, Wireless RF-keyboard, Logitech USB noicecancelling mic, NV RVcam
Not Sirius or XM at least.
Other than internet streaming of course.
streetdeck works with sirius as well
Pentium 4m 1.5GHz|MB896|Roadie Extreme|XM-Direct|Rikaline 6010|T-View 7"|Streetdeck|160gb Western Digital|1Gb DDR2-533 Ram