I think that the forum could reallly help to promote discussion.... people can remind themselves of what has been said during a long discussion. This is more difficult with an email digest or thread.
We can create an area that only has access via a "group list". This way, only members of that list can see or post to the forum.
I'd like to figure out how we'll do this, then, put a blurb on the front page of the website to attract those who may not have seen the original forum message.