This is great!
http://www.tdpri.com has had a recording subforum for some time now that is frequented by some really helpful and knowledgeable people (
http://www.tdpri.com/forum/recording-progress/ ). This forum here on AGF is a great idea because the focus here is almost entirely on acoustic instruments, and largely different styles of music, so the discussions here will probably tend to be a bit more relevant to us AGFers on average.
In general I think too many subforums can make a discussion forum less effective because many folks will not go to the effort of checking out all the subforums on a regular basis, but I think concentrating the recording discussions here will be a good thing.