When the activity level drops below a certain point, our forum is removed from the Active Forums list and is automatically placed in the All Forums list. Your Administrator-- Steve
If you click on "show all forums (includes the inactive ones)" you will find this forum. I suspect there's some minimum number of hits/contributions necessary to be on the main index page, and this forum probably doesn't always meet the criterion.
Maybe if Steve and I keep submitting the same responses at the same time we'll get this forum back up there!