Bob,
We'd be more than happy to help however we can.
For LinkedIn, if you haven't already, check out the
LinkedIn Application setup guide
. That should get you the information you need if you're wanted to add LinkedIn authentication to your site as well as the other social networks.
To add the social buttons in your content, please check that:
* You've enabled the System - JFBCSystem plugin
* You've enabled the Content - JFBConnect
* Then, in the JFBConnect -> Social configuration page of the admin area, you can choose what buttons to enable or disable on your site.
If none of the buttons are still showing, please let me know what extension you're using to show your content. I'm assuming your using the built-in Joomla Articles, but if you're using another extension, let us know, and we'll help narrow things down however we can.
Thanks,
Alex