EFF on Zune DRM
The Electronic Frontier Foundation reports (emphasis theirs):
Microsoft’s Zune will not play protected Windows Media Audio and Video purchased or “rented” from Napster 2.0, Rhapsody, Yahoo! Unlimited, Movielink, Cinemanow, or any other online media service. That’s right—the media that Microsoft promised would Play For Sure doesn’t even play on Microsoft’s own device.
Apple’s DRM is much more reasonable, but I still don’t find the music or video at the iTunes Store tempting with the current prices, quality, restrictions, and omissions.