As people should know, the "virtual office" or "virtual bar" (depending on the time of day) where devs and users hang out is the IRC chat room generously provided by codehaus.org.
For those who don't want to or can't run IRC clients, don't despair, there are web interfaces. Codehaus has http://irc.codehaus.org, but I thought I would show a new ajaxy web one that I think works quite well:
Go to here and click on the "Server" link. Enter irc.codehaus.org as the server address, and #drools as a channel, and a short nick name (< 8 chars please !).