A couple of friends of mine are involved in setting up a new networking site for people who love forests, trees and wildlife. It is not just a forum, but includes the facility to upload and read articles, both scholarly and of general interest, keep a woodland blog of your own, sync with Twitter and Facebook accounts, get real time advice and listen to Folk Radio via the web site. Some of the folks on there are very knowledgeable. It is called ForestComms.org and is on
http://www.forestcomms.org/ - different from SWOG, might be worth having a look.