It's not even our umbraco mailing lists one year birthday yet, and still we have had a blazing number of messages sent. 3590. And 290 members. In the first year! Compare stats like these to closed systems like synkron developer forum, who have had 94 posts in almost two years.
Maybe we'll reach the 4000 messages mark or 300 members before we launch the new forum at our website.
It's very fun times - a nice thing as we're preparing this years umbraco developer conference f.m.a. CodeGarden.
BTW: Kudos to synkron for having an open forum. It's the only closed source cms I've seen who has taken that step - do you know anyone else...?