I'll agree it'd be better above. However, that's hard-coded in JomSocial's template for their Login with Facebook button or for ours. To move that, you'd need to move it in their template.
With that said, I've attached 2 pictures of both the main JomSocial 3.0 landing page and registration page when using JFBConnect v5.1. We're implementing new image buttons instead of the current (smaller/less noticeable) button implemented now. It should stand out a little more and, when combined with the Google+ or LinkedIn integration (if enabled) draws even more attention. Please note that G+ integration will be part of v5.1. LinkedIn will be incorporated into JFBConnect later this year, but can also be included with our separate JLinked extension.
As always, feedback is welcome!
Thanks,
Alex