For those teams that have the haphazard system of sending out emails to their team members and all, perhaps you should consider getting a forum? If you go to
http://proboards.com you can register a forum - already setup, hosted, everything - for free. It takes liek 30 seconds.
Our team has a forum of sorts and it works wonders. We do a lot of communicating on it since not all the team members come out to meetings (and some of us are alumni working
) We try to make participation in it mandatory, but it doesn't always work.