A conflict occurs with Event Espresso in both free and paid editions. When a user registers for an event, the confirm registration page doesn't display. I've tried to look into it as much as I can with the time available and not been able to find a solution modifying Event Espresso, so now I turn to SFC!
I've got a somewhat detailed account of my tracing the error here: http://eventespresso.com/forums/2012/04/registration-confirmation-not-showing-plus-double-up-on-registration/. Any suggestions on how to resolve this conflict would be great as I haven't found any comparable Facebook Connect plugin to SFC and would like to keep using it!
http://wordpress.org/extend/plugins/simple-facebook-connect/