Here’s what Microsoft has to say about the Zune’s wireless features:

Wireless Zune-to-Zune sharing lets users spontaneously share full-length sample tracks of select songs, homemade recordings, playlists or pictures with friends between Zune devices. Listen to the full track of any song you receive up to three times over three days. If you like a song you hear and want to buy it, you can flag it right on your device and easily purchase it from the Zune Marketplace.

Microsoft seems to be emphasizing the use of wireless sharing as a way of discovering new tracks, over things like synchronization or downloading podcasts.

Microsoft is positioning the Zune as the first step towards creating a platform that encompasses the same territory as Apple’s iPod/iTunes, but also expands upon it.

“With Zune, we are not simply delivering a portable device, we are introducing a new platform that helps bring artists closer to their audiences and helps people find new music and develop new social connections,” said J Allard, vice president, design and development, at Microsoft.

Microsoft plans to ship Zunes preloaded with content, a nice move. Each Zune device will be preloaded with content from record labels such as DTS, EMI Music’s Astralwerks Records and Virgin Records, Ninja Tune, Playlouderecordings, Quango Music Group, Sub Pop Records, and V2/Artemis Records.

This trend seems to open up great promotional opportunities for record labels. Let’s hope that it doesn’t end up being a barrier to indie labels and artists.

Microsoft also introduced three accessory packs for Zune users. The packs and the individual accessories, all designed exclusively for Zune, will be available at launch:

• The Zune Car Pack includes the built-in FM tuner with AutoSeek and the Zune Car Charger.
• The Zune Home A/V Pack includes five products that integrate Zune with the TV and music speakers: Zune AV Output Cable, Zune Dock, Zune Sync Cable, Zune AC Adapter and the Zune Wireless Remote for Zune Dock.
• Zune Travel Pack is a set of five products for mobile entertainment: Zune Premium Earphones, Zune Dual Connect Remote, Zune Gear Bag, Zune Sync Cable and the Zune AC Adapter