Sounds like some aspects of Google Wave. Interesting idea - make it big before Google Wave is released and takes off, or you might have trouble gaining traction. ;)
Good luck!
That concept is somewhere in my personal idea list. Now I can cross it out. Well done :)
URL: http://moogroups.com
great name
I think it looks pretty cool. I don't have a group I need to set up right now, so it makes it a little tough to really give it a run through.
I'll definitely bookmark to check out later though.