I don't understand how CAG loses any credibility when it was posted in a user-created blog, as in non-official. CAG news comes from the deals section forums, and the overwhelming majority of those are user-created. Kotaku, as well as other blogs, got burned.
@Duoae: They still have a product in the marketplace that could have similar technology. This doesn't seem like a patent trolling case, unlike that controller guy.
They seem to be talking about this update a bit more than they have been in the past in relation to previous updates. I wonder if this might hit earlier than November.
Even if it was a standalone pack, they'd probably release an update the day of its' release allowing you to put it on your HDD so you could play it through Rock Band 2.