James,
It's a $59 subscription for 6 months. There is a renewal discount of 30% off as well if you re-subscribe before your current subscription expires.
As for JomSocial compatibility, there's a setting in JomSocial to enable our features. Once enabled, that will replace their basic Facebook integration with our enhanced Facebook features, as well as Google+ authentication.
If you haven't already, check out our
JFBConnect Integration into JomSocial
features page.
I hope that helps, but if you have any questions, just let me know.
Thanks,
Alex