In version 7.2 of EndNote you are finally able to share your library with others. Everyone who wants to share a library need to have EndNote version 7.2 as well as a EndNote-web account.
The libraries are synchronized through the web version of EndNote.
Go to my.endnote.com in order to create an online account.
This means that you can have two dektop versions if you are working on different computers. See how to do this from 3:45 in the video above.
You can invite up to 14 people to share your library. Everyone will have access to edit and add new references.
Read more about how to start using the web version of EndNote and how to synconize your library.