Mine worked. It was a little bit weird, and I don't remember what magic I went through to get it functional, but mine works.
But now my concern is more of a fundamental failure of the Apple Store. It's not going to fly because it fails in the one major way that the "Other music distributions systems" succeed. Apple's online store gives you .m4p, a protected file, meaning you don't own it even though you bought it. That's the line that the music industry isn't willing to concede on. Until they give us a legitimate method of owning music, we'll continue owning it illegitimately.
I'm bummed really, that this is the version that's Apple endorsed. I thought it might actually be consumer friendly. If Apple's computer service goes offline, you can no longer play the content you purchased a license to listen to. I'm tired of being treated like the enemy of the RIAA, when I would be perfectly willing to give them reasonable return for reasonable content.