People love to share recommendations with friends - especially when it comes to music. Image you're listening to a new cool tune and you would like to recommend it to a friend. Or a certain playlist is just gorgeus and all your friends on Facebook should know about it - in this
case the new sharing feature comes in handy!
Where can I find this new feature?You can find the new sharing button next to several data types including tracks, playlists or artists. See two examples below - the "Now playing" sidebar and the track listing:

How does it work?
When you click on on of the buttons, a dialog in the upper right corner will appear. Here you can select friends, enter email addresses (they will be saved for later re-use) and post your items to several services including Facebook, twitter or myspace. Additionally, you can find a direct link to use in Skype etc.
How does it look like in Facebook etc?
Here we've an example how a posted items looks like in Facebook - you can see the cover art, a short description of the track, your comment and the link for your friends.
What is shared exactly?
To stay legal, your original track will not be shared with the public, instead of that people will be guided to a general site with information about the track and further information about the artist / playlist. If available from public sources, people can play the track. See an example here:
Feist - 1234.
Within tunesBag it stays the same as before - you can listen to the recommendations of your friends by opening the playlist "Recommendations".