If Myspace Music doesn’t work with iPods, iPod owners will simply ignore it; like they have the Zune store, Rhapsody, Napster, etc. They might find new music on Myspace, but they’ll still buy it from iTunes, Amazon, Amie Street, eMusic, or any other iPod-compatible site.

I agree that Myspace Music could eclipse iTunes, if they open themselves to every musician. The concern I hear the most is (as is my concern as an indie musician) - will Myspace Music be only a major-label thing? In which case, it might sell some music, but won’t touch iTunes. If they support indie musicians, give them data like CD Baby does, then they will probably become the store of choice for most artists, but we’ll all see if the buyers go there or iTunes.