Have it work with RSVP?

Yes, it works with it in the sense that the two mods don't cause any conflicts with each other. What I'm suggesting is that they be tied in together more closely, giving users the option to have RSVPs automatically created at certain junctures (i.e. 5 days before the event) on nodes that have been repeated.

An example: I'm creating a site for local board gamers to organize different groups and schedule events. So, we're using Organic Groups, Date, Calendar, etc. Their groups will ebb and flow with people joining and leaving all the time. Many of them will create recurring events, for example, a gaming meetup every Thursday for the next year. That is where node repeat comes in. However, the RSVPs don't need to be created until a week or so before the event. This is important so that when the invite is sent, it catches all the newest people to have joined the group and missed all the people that have left the group. This can currently be done manually by the person going in and creating the invite each week. However, the true power would be if the RSVP were automatically created for recurring events on a schedule. This would give Drupal functionality to compete with Evite, Meetup and Google Calendar.