If you’re interested in greenbelts, you should join the Global Greenbelts Network. It’s new and should be an interesting group. I just recently joined, after having attended the conference hosted by the Friends of the Greenbelt Foundation back in March.
Look for Amati and Taylor coming soon in the Town & Country Planning Review with a brilliant review of the conference.
For more info try http://www.globalgreenbeltsconference.ca/