Satellite radio options that I found:

Sirius

SiriuCE - Free*
http://www.emulamer.com/SiriuCE.html

Pocket Sirius Radio - $15.95
http://www.handango.com/PlatformProd...oductId=178265

XM

Mini XM
http://www.minixm.com/DS/

Pocket XM Radio - $15.95
http://www.pocketgear.com/software_detail.asp?id=19394

Note:

*The only one I've tried is SiriuCE, the free one for Sirius and it works on the 700w. I can't say whether or not the others work, but if you test them out please post here.