I'm 25, and though sometimes I do feel a bit young, I don't think that another forum would be necessary. I think that separating ourselves from the other ages would almost hinder our progress. I know I haven't been on here long, but I think it has helped me quite a great deal to be able to interact with others who are older and have had a much longer history with substance abuse and alcoholism. I think by almost "putting us" in another group would not allow us to be exposed to all the vast range of experiences that are out there.
Besides, I think us "youngins" end up finding each other in some way or another regardless.