We Need a "Clues for the clueless" category at JU :-)
To quote from the article...
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. Buried in footnote 4 of its press release, Microsoft clearly states that "Zune software can import audio files in unprotected WMA, MP3, AAC; photos in JPEG; and videos in WMV, MPEG-4, H.264" -- protected WMA and WMV (not to mention iTunes DRMed AAC) are conspicuously absent.
And it gets better!
[Postscript: In an interview with Engadget, Microsoft Zune architect J Allard pointed out that Zune has sufficient video format support, in part because there's "Lots of DVD ripping software out there that encodes to those formats, so the most popular formats out there, whether it's MPEG-4 or H.264, we'll support those." Gee, he isn't suggesting that his business model benefits from customers using tools like DeCSS or Handbrake to evade the DRM on DVDs, right? Especially since Microsoft is furiously trying to squash the FairUse4WM tool, that would seem rather hypocritical.]
Check the whole article out for additional links.