Even though I’m a Mac user (G4 666 TiBook) I can’t be too upset over Real making a decision to launch on Windows. Aside from the enormous difference in market share, the Mac user community has a large collection of fanboys and zealots for whom no Real solution would ever be acceptable, even if it had twice the selection of the iTMS at half the price. In their minds, the Apple product would be superior no matter what, and Real would be fighting even more of an uphill battle.
I agree that CDs are still the best bet right now, in terms of rights and future value. I was able to get the entire Master of Disguise CD from eBay for the same price I paid the iTMS for the one song I bought off that album. Of course eBay also means paying for shipping and handling and waiting a lot longer than a download.