This may be a question for Jim ultimately, but floating an idea developed with a colleague not too long ago:
(1) what do you think about adding a chat room to this network (e.g. meebo)
(2) once a chat room is in place, using it for scheduled talks on specific themes for these purposes:
(a) professional development/instruction
(b) brainstorming ideas
(c) support for one another, such as when one of us has a problem to quickly solve
kind of like an online unconference session which we could spontaneously hold at any time.