We create our presence on Facebook recently. New jobs added to various disciplines and new posts on conferences and other events are posted to walls of Facebook pages*.
There are separate Facebook pages for every discipline.
So far about 150 users clicked the “Like” button. Did you checked the page?
Go to http://www.thesciencejobs.com/facebook.php
*A Facebook Page is a public profile that enables one to share business and products with Facebook users.