Much like this blog it is difficult to get it set up and then folks to read it, and then hope people are interested enough to come back and use it again.
The forum has now got 8 members and all have contributed with some coming back again. It like most things in the garden will need a little attention but once formed I guess will simply look after it self. I just thought it might make a great addition to the blog and give folks more of their own input as they can advertise their own sites and use it to communicate with others.
Time will tell, but if you don't try you wouldn't get to find out if it works.