I had done a demo application at the Adobe Max conference I spoke at dealing with a video chat application on Facebook. I decided to go ahead and flush it out implementing RTMFP and posting it officially on Facebook for usage. It can be found here: http://apps.facebook.com/eye__to__eye
It's an application that allows you to video chat with anyone one of your friends. Both friends need to have application loaded at the same time and they'll be able to video chat with one another.
If you find any problems with it let me know. It is a work in progress but will get some love to make it nicer.