Was in the process of putting a list together on eMusic of my Best of 2006 that they carry, and when I went to add Cheap Trick's Rockford, I noticed it was gone - the link was dead, and it didn't show up in a site search. Too bad; hope you eMu subs got a chance to grab it while it was up. Not sure what happened there, and I'm too busy at the moment to investigate. If you have any insight, let us know in the comments.
UPDATE: Perhaps it has something to do with this. Just pure speculation on my part, though.