ZuneHD device and Zune 4.0 software updates are out, and man are they impressive! I am already using the 4.0 software and LOVING IT. Smart Dj is really great combined with Zune Pass, its just such a winning experience for discovering music.
(Zune Pass = unlimited renting of any music up in Zune marketplace for a monthly fee)
For complete coverage check out Paul’s WinSupersite coverage on the device, software and iPod touch comparison:
Download Zune 4.0 here: http://www.zune.net/en-us/products/software/download/ (Windows only, XP, Vista or 7 for both x86/x64)
(Also check out the Zune Podcast section, with the ability to play any podcast right from the page using a slice Silverlight player: http://social.zune.net/podcasts/)