Dan
I was in the same boat regarding the Discussion Group.
I suggested to a friend (our course supt) to see something on the Discussion Group regarding the UK greenkeeping experience, and some recent BIGGA research. He got to the main page of the Discussion Group, but then thought he had to log on (which he couldn't). Apparently, it wasn't obvious to the casual browser how to access the topics of discussion. I suspect some other possible readers suffer the same fate.
However, the website is really cool.