There are a few different options for redirection that we provide, all of which involve pointing at a given menu item. In the JFBConnect component, New User Redirection and Returning User Redirection settings are for when users register or re-login with a social network. The Joomla Login Redirection URL setting is available in the SCLogin module and is used when a user logs in with Joomla credentials.
Using these settings should get you going, but please let us know if you have any questions to get it working.
-Melissa