Gizmoodo has a comprehensive review -- with pictures and YouTube clips -- of the Zune player and Zune Marketplace.

Two things mentioned are new to Coolfer. One is the upgradeable software. As it relates to the WiFi, "the Zune should be able to possibly do stuff like share songs over the internet, wirelessly sync with the computer, stream music/video to other devices, and much more." The first edition won't have those features, but software updates could allow for them.

Second, Gizmodo describes a feature called guesting. "A friend can take his Zune over to your computer, set up a 'guest' relationship with your Zune Marketplace software (as opposed to a regular owner relationship), and you're free to drag songs and pictures from your library onto her device. These songs do not have the 3 play 3 day limit on them."