Mark,

One thing I'm excited about with doing the calendar, is group
scheduling. Integrating functionality from something like
http://doodle.com I think could be really neat.
http://signupgenius.com is another one.

Oh, thanks for the tips! Especially signupgenius. I've been using forms in Google Drive to organize volunteer donations (food, prizes, etc.) for PTA events. A bit awkward but it works. A built-to-purpose tool sounds like a much better approach.

That's a hint that organizing "what" may be valuable as well as "who" and "when".

-- Shal