Add a Facebook SEND button to your website

  Facebook has added a SEND button so readers can privately share things with groups and individuals

Quote from Facebook
How It Works
The Send button is a social plugin that websites can use to let people send a link to a friend through Facebook Messages, post it to a Group, or email it to an individual. For example, if you see a Mother’s Day gift idea on 1-800-Flowers.com, you can now send a message or email to your family members to discuss. Or say you’re training for a marathon and you come across a great article about running shoes on The Huffington Post. Now you can share it with your entire running group in just one click.

The Send button drives traffic by letting users send a link and a short message to the people that would be most interested. They don’t need to leave the web page they’re on or fill out a long, annoying form. Compared to the alternatives, the Send button has fewer required steps, and it removes the need to look up email addresses by auto-suggesting friends and Groups.

Designed to be used alongside the LIKE button, people will have the ability to broadcast the things they LIKE or SEND to specific people.

For more information and instructions how to add the SEND button go to Facebooks Developer Blog or the Button Wizard