Facebook login 'pinging' out to 'Friends'

Although I haven't tested this, you should be able to add any query parameters you want to the URL in the Login/Registration wall post. These can be used by Google Analytics or whatever other methods you use to track. For building the right query for Analytics to automatically track things, you can user their URL builder below:
www.google.com/support/analytics/bin/answer.py?answer=55578

To my knowledge, Facebook doesn't strip any of the utm_xxx tags, but you'll have to test and see. Of course, if you have other ways to detect referals, you can add that to your query string as well.

Hope that helps,
Alex

In the configuration area of JFBConnect, on the Status/Wall tab, you can set the specific URL that is posted for your page. Then, to set the title and description for that page, you'll need to use the Open Graph tags. These can be enabled in the Social configuration area under the Open Graph tag. Simply enable them there, and then on the page that you're posting to user's wall, add the following tags:
{JFBCGraph title=Title for page}
{JFBCGraph description=Better description for Facebook for this page}

You can add these tags to any page, and they'll be used when posted to a wall either through login/registration or when a user likes, comments, or otherwise shares a page.

Hope that helps,
Alex