Mama always said to share. Now you have an opportunity to do it with music and photos. With wireless Zune to Zune sharing you can send your favorite tracks and photos to friends.[1]

[1] The Zune to Zune sharing feature may not be available for all audio files on your device, and works only between Zune devices within wireless range of each other. This feature allows recipients to play full-length sample tracks up to 3 times in 3 days.Â  Recipients cannot re-send music that they have received via the sharing feature.

Duh, "sample tracks, 3 times" I'm sure they'll break the doors down for that feature...