angus - i think yahoo group is a good idea. when you post message in yahoo group, all the group members will receive the information via emails as well. as colacat said, you can save files too. i've set up yahoo! group before. let me know if you need help on it!
For those who want to join the chatting event 8:00PM-10PM ET every Saturday night, we will see you on Group home page: http://groups.yahoo.com/group/GNAT2005 chatroom.
Angus
PS. Xiao_zhutou and i tested the chatroom on Sunday night. It was very nice.