Calendar Event Registration/Signup

[Bacteria Man]

I need to create an event registration module to allow users to sign-up for calendar events.

The high-level flow would be something like this:

1) user selects event from calendar view
2) user selects "Register for this Event" link (just like "Request Reminder...")
3) user fills out registration form
4) user is added to the list of registered attendees

The data collected could be added to their user profile and/or associated only with the event.

I have been told such a mod already exists. Can someone tell me where to find it?

Thanks.