I know why Yamaha's Sirius Internet Radio is no longer working. I've been a sirius subscriber for years and have used a variety of 3rd party tools to connect to Sirius because I'm not really interested in buying a radio for each place that I want to listen to sirius streaming. It's one of the main reasons I chose the Yamana high end line of receivers so I could get Sirius without adding on an external radio. Sirius has done something to actively block out ALL 3RD PARTY internet streaming programs.
Here is a press release from Rogue Amoeba where they have basically discontinued one of their primary products because Sirius has made it clear that they no longer want 3rd party developers to provide internet streaming, even if you have a valid streaming account.
I have a feeling, although the Yamaha folks that posted earlier in the thread didn't come out and say it, but when Sirius blocked those 3rd parties they also started blocking the mechanism that Yamaha uses. It makes perfect sense because Sirius only gets $3 dollars or so for internet streaming which includes streaming to your idevice or android but if you had to add the Sirius receiver to a Yamana system you would have to pay an extra $10 - $15 a month for that device... and if you have a few Yamana receivers in your house in various spaces, you can see how that would quickly add up.
iDevices and Android are unaffected and you can still stream from a computer as long as it's done with a browser and NOT any 3rd party software.
We basically need to wait and see if Yamaha is able to get a fix in place with Sirius. I'll be really angry if this isn't resolved because I own 3 Yamaha units that allow Sirius IR and it was the deciding factor for me given the choices available in the market.