Has anyone been able to activate XM Radio using a browser on a Mac? I recently picked up a new receiver that is XM-ready, so on a lark I picked up the little add-on that lets me get XM Radio. I'm glad I checked out their website before I opened the package, because I found that in order to activate the service online, you have to use IE on a Windows computer. And if you register over the phone instead of online, you get whacked with an extra $5 activation charge. I sent the company an email, asking if they'd waive the charge, since I wasn't inclined to pay a $5 penatly for not running Windows. Yeah, its kind of petty to be worrying about $5, but given that Mac users tend to be early-adopters of technology (espeically music-related technology) you'd think they'd support us.