I like it the way it is because it encourages the visitors to explore and look around and discover the tools as they go. If the \"Discussion site\" is the main page the newbies will go straight for the discussion and start asking questions right from the start without even reading the basics.
I am pretty sure Patty and Peter considered all types of ideas before they came up with something they can manage and serves the purposes of their business. I like to respect their ideas since they let me visit and use their house for free!