According to Zune MVP extraordinaire Marques Lyons of InsidetheCircle, this spring ZuneHD owners will get a software upgrade, which will reportedly allow them you SmartDJ from their devices.
Starting last fall, all users of the Zune desktop software have had the ability to have the Zune services automatically create playlists based on what songs or artists you tell it to, also giving you the option to use only songs from your collection or from the Zune Marketplace itself. Check out Marques’ find first hand here.