You know what, it does sound fairly close – although I must confess I’m wary of spending another $50 without being sure whether this is the right avenue to proceed.
If there’s a publicly viewable list of events submitted by a “community”, then I could try to enforce a mapping of an organiser to a community and get around the Organizer page problem that way.
Any ideas then how to grant edit access to specific Pages to an Author or Contributor User in a way that’ll work with TEC?