I called Sirius and it said they were experiencing service outages for online streaming. Yesterday my Sirius widget was not working at home and not working in my office. Also, online streaming from sirius.com was not working either from home or from the office. However, my Logitech Squeezebox was working just fine. Today I can stream from sirius.com. I don't know anything about the iPhone app, but if it is an officially-supported app this suggests a problem on Sirius' end.

And yes... this is driving me absolutely nuts.

These are the steps if you are using Pocket Tunes on an iPhone, I only post them here in case the process can help get a fix going for our beloved widget.
Settings Pocket Tunes Force Catalog Update = ON
Launch PT APP. Go to Stations and choose Sirius or XM and the channel.
Delete your current Sirius XM favorites.
Resave favorites as needed.
LOVE this app, praying for a fix soon.
Thanks!

Well, this certainly does bite!!

Apparently Sirius has changed something on their log-in URL. No 3rd party apps, including the iPhone app are working as of yesterday.

It seems that something has happened to every account I have, along with everyone that I know with this widget. It stopped working mid-day 11/14/09 and now every time we try to sign in it gives an error that the username and password may be incorrect. I can, however, sign on to Sirius' media player. Has Tanner J experienced this also?