But, yeah, it's hard to go to something else cause of the friction.
What we really need is something that is as integrated into fb events as fb, but _also_ allows people who aren't on fb to find and keep track of and RVSP to events.
I think facebook API's don't really allow you to have that kind of integration for a third-party thing though. I would assume this is intentional.
(I find out about a lot of events on fb not by searching for events, but by facebook timeline telling me "your fb friend is interested/going to this event. If you can figure out a way to approach that kind of experience with your non-fb thing, it might help).