Hi,
I just wanted to announce that based on request from one community member I created a new feature in wm-bot, which may appear to be unneeded on first sight, but when I was thinking of that, it's not really so stupid. It collects various informations about user activity in channel (in xml) and allow them to be rendered in some way. In this moment I only display number of messages for each user, for example:
http://bots.wmflabs.org/~wm-bot/db/%23wikimedia-labs.htm (scroll to bottom)
This is happening only in selected channels as experiment, but I believe that it could motivate people to be more active and therefore more helpful in these help channels. Also it would let us see how much bots are active compared to people. (For example in #mediawiki.htm you can see that most active users are bots)