With permission, of course. I've seen this before, but can not for the life of me find any information on it. What I want to do is have a form that people fill out to register for my event. Then, I want them to have the option to post it to their wall.

On their wall, I want something like "John Doe just signed up for this super cool event" with a link to the site. Any ideas on how people are doing this?