The Zune HD has been available for a while now. Tweaktown has published a review of the Zune HD and AV Dock today.
Quote from the review: "If you were to ask someone to describe an MP3/Video player they would probably begin to describe to you your average iPod. If you went a little further you would probably find them talking about the iPhone or the iPod Touch. The reason for this is that Apple, as of right now, simply dominates this market. But as with many companies that have a dominant market share, they have gotten lax. The iPhone and iPod Touch were revolutionary when they came out. The design was new and sexy. Now the design is showing signs of age. The consumer electronics market is jaded and fickle. If you keep using the same look, eventually you will fall out of fashion."
Read the full review on Tweaktown.