Interesting, when I had my Sirius installed at the dealer, no software update was required. Well then, it does seem that either you need Nav or factory installed Sirius to get the mp3 working...

JDN, thanks, I wish I had the WB in my car. Would useful seeing how we seem to have to evacuate at least once a year of late for a big hurricane...
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Hmm, so your saying that your iDrive always included SAT as an entertanment option and it was just waiting for the hardware to be installed so it could be heard through the system. I wonder if all the Sat preps show this in the list of entertainment options?

Like most issues w/ the car, I think it is a Nav vs. non-Nav issue. Those w/ nav (and therefore Radio Pro) seem to have the WB, at least in the earlier models. Maybe that is fixed in the 2006 U.S. models.