Help me decide if COD is the best place for me to contribute, please :)

Hello all,

I am the developer for a top 20 trade show and have built a custom registration system for us that we have used for the past three years. I have some free time over the next several weeks, and I was considering making it into a full-fledged module (group of modules) that I could contribute back to Drupal that would be more integrated with Drupal, rather than just being a sort-of app-next-to-Drupal that it is now. I am also helping to organize an open source conference (shameless plug to mosscon.org, we'd love to have you!) which is where I was introduced to COD, which has led me here. I was hoping to throw out a brief outline of what our requirements are and see if they line-up with the future of COD; if so, I'll start digging through how I can begin contributing to make it something that we can use as well. My main concern is: are our registration needs outside the intended scope of COD? I know the event/session/seminar set-up is right up COD's alley.

• We have an Event.
• Event has 0 or more RegistrationTypes.
  • Registration may or may not be free.
  • Registration may have different rates for different time periods (“early-bird”).
  • Registration may or may not be created by anonymous user (general attendee = anonymous, vip = authorized user)
  • Registration by anonymous user may or may not create a User account
  • User account can own several registrations
• An Event has ChildEvents (give-a-way, press conference, Fleet Forum, etc.)
  • ChildEvents can be owned by EventParticipants (exhibitors, sponsors)
  • ChildEvents may inherit (usually do) registration from Event
  • ChildEvents may or may not require additional registration.
  • ChildEvents can have ChildEvents
  • ChildEvents can have 0 or more EventParticipants::Sponsors
• An Event and ChildEvents can have EventParticipants (Exhibitor, Sponsor, for example)
  • EventParticipants can have 1 or more classification (Exhibitor, Advertiser, Sponsor)
  • SponsorLevel can be assigned to Sponsors
• An Event and ChildEvents can have 1 or more Sessions
  • Independent of Tracks
  • ChildEvents can have 0 or more Tracks
• Tracks can span multiple days but restricted by parent::ChildEvents
  • Tracks inherit parent::ChildEvent registration
  • Tracks may or may not require additional registration
  • Tracks can have Breaks
  • Tracks can own 1 or more Rooms
  • Tracks can have 1 or more Sessions
  • Sessions cannot have Sessions
  • Sessions are assigned Rooms

I would appreciate some feedback on this as I would rather be contributing to COD in a way that helps us and that allows us to contribute to the community, if it's feasible given our needs. Also, I don't have much, if any, interest in working on Drupal 6 (unless it's backporting as we build).

Thanks much!