SharkJumping

Having been through a similar and ultimately fruitless exercise three years ago, I don't think music labels exactly quiver at the announced DOJ investigation of their digital music pricing practices.  They generally just have their lobbyists back up the bank truck, dump their load, and then watch the DOJ political appointees scurry for cover as various key elected officials race to protect them

However, given that the DOJ has been shamed into it by the Spitzer investigation, it's possible they might even follow through a bit, hold some hearings, and even demand some documents before they let it whither away so that they can focus on new ways to wiretap citizens or how to track down every Google pornography searcher.  As discussed before in this post, I believe the more interesting overall discussion is the one concerning Most Favored Nations clauses (Wikipedia definition here), and not the one around overall pricing since the MFN clause negates the need for any pricing collusion, which even I can figure out without going to law school.