We are using nextgen gallery plugin and nextgen voting plugin to allow people to vote on images on a next gen gallery.
We want this integrated onto Facebook (though an app) so that we can use it as a tab on a page. However, the voting plugin at the moment works on taking the users IP address and only allowing one vote per IP address. We need this to integrate with Facebook and instead of working on IPs it needs to work on Facebook user IDs. So that the plugin only allows 1 vote per Facebook user ID.