I'm already speaking with my wallet concerning iTunes DRM. I'll buy from the iTunes store if the song I want is an iTunes plus(DRM free) song, otherwise I buy music from Amazon. Amazon has a nice tool that integrates the music right into iTunes so you get the best of both worlds, DRM free and easy to use interface. 90% of my purchases over the last year have been from Amazon.
At the same time I'm educating my 6th grader about why he should buy DRM free music. It seems to be getting through. You've got to start somewhere.