Moderator Comment: Added later: Sherlock Forum's chat function has been disabled due to lack of interest.
If you cast your eyes up to the main menu bar at the top of the forum you'll see a nifty new "Chat" tab. Currently we only have a free license and hence only 5 users at a time can access chat. However we may seek to up that limit with a subscription to the chat service if it proves popular!
Watch this space!