Advanced Search Feature by Seminar and Attendee Status - It would be an extremely valuable feature to be able to do an advanced search that can filter contacts by their attendee status for seminars. For example, we use the bulk actions to send a broadcast message to invite clients to the event. A week later we send out a reminder to RSVP but I would not like to send an RSVP reminder to those who have already RSVP'd. It would so be able to send out a broad cast email to those who have RSVP'd.