Got the S-50 for Christmas. This thing is unbelievable! I have been spending most of the day loading MP3s from my computer onto the device.
Only one problem though (and this might be a good thing). The SID number to activate on the outside of my box didn't match the S-50 on the unit, so I couldn't activate online right away. What frustrated me is that I spent over an hour trying to get a hold of the activation department. The line was busy the entire time. What occurred to me is that there is an overwhelming number of people trying to activate their radios today...more than anyone at Sirius anticipated. What does that mean? Time will tell.
Good news is, I uncovered the correct SID number under the battery in the back and I am officially activated.
I can't imagine that I will be using my iPod much anymore, but you never know....