FB Like popup

I've never used that module, so I don't know exactly what it does. From a glance, it shows your Facebook Page information using the Like-Box widget from Facebook. JFBConnect includes both the JFBCLike and JFBCFan modules that can let a user Like your Facebook Page from your site. The JFBCFan module is specifically for Pages and let's you show the header, stream and avatars of user's that have Like'd the Page. That seems like what the module you linked to does as well, but if I'm missing something, let me know exactly what you're shooting for.

Thanks,
Alex