Here is another reason why I'm a Zune fan.  The really cool (assumed to be WPF) client is awesome.  One feature I never really used was the full screen display of music currently playing.  Check out the screenshot below assembled from my album art.  It rotates through your albums periodically so the mosaic of your albums change.

Click on the image for an enlarged version

Check out my Zune Card!  This is my large card.  I also put my Zune card in the column on the right above my XBOX Card.  I can't wait until we can separate the plays between users of the same ZunePass.  For example, if I have to share a ZunePass with anyone, their plays get streamed into mine and displayed as one.  I'd like to have separate ones.  Of course, I would imagine the complication would be that if we all had separate logins for ZunePass, that would mean that if you are logged in and syncing a Zune, then you are implicitly saying "the music play data on this Zune is representative of my plays."  Then , what comes next?  Pushing the concept of a user account down to the Zune?  What if someone plays a song by an artist and you don't want it to show up?  Do you then need an interface to edit your plays both before and after they are uploaded?