The official Zune home - zune.net is finally alive, confoundingly (if you understand SEO) at the URL: http://www.zune.net/en-US/. In 2008 onwards, when other countries get the Zune, one presumes that we will see URLs such as http://www.zune.net/en-GB/, http://www.zune.net/en-AU/ etc. Anyway, the Zune team is too busy with meeting the deadline, so SEO is probably not even on the horizon. :(
The site features the Zune Marketplace, another SEO-challenged site - Zune Arts (https for some reason not yet obvious), Zune accessories, sharing Zune tunes, events and links.
The Zune Pass is very appealing - sign up for a free trial, or get a monthly or 3-monthly pass and you can download as much as you want.
The site has many nooks and crannies worth exploring - check it out!