Uhh... yeah.. you've hit on one of the ugliest parts of our component, unfortunately. There's no template override or styles we provide to really alter that section well. With that said, using the styles we apply, you should be able to get pretty close with using the template classes that are automatically applied to the page.
So, let's start with:
.com_users.view-registration .maincontent .sourcecoast .row-fluid {
border: 1px solid black;
padding: 20px;
margin-bottom: 20px;
background: grey;
}That will make the entire block look very similar to your picture above (you'll need to adjust things a bit though, but you'll get the point).
Then, the below will make the social buttons on their own line:
.com_users.view-registration .maincontent .social-login.google {
clear: both;
}Combined with the intro text from the language file, which you could use something like:
COM_JFBCONNECT_REGISTER_WITH="<h2>Social Media Registration</h2><p>Use your existing social account...</p>"
And you should be really close. The only thing you're missing at that point is the post-text. We can help you add that pretty easily, though it would take a code change. If you can make the above work, then you should be golden without messing with any code.
Let me know how that works for you!
Finally, Joomla Day Florida was great. Saw some old friends and made some new ones. Probably a few too many beers though
All the best, and thanks for your patience,
Alex