I'm talking about the "Connect with Facebook" and "Share" buttons that are now part of the TopOfGuitar experience.
The way it works is simple: you can login to TopOfGuitar by clicking on the "Connect with Facebook" button located on the top right section of each page.
Once you're logged in using Facebook, you will see the "Share" button next to each bookmark's thumbnail.
If you want to share that bookmark with your Facebook friends, just click on the "Share" button and this will initiate the same steps as if you were posting a link from your Facebook page.
Simple! Hope you like it.