"Green" birding is still slowly building in North America. It hasn't taken off as much as some would hope, but it has gained adherents. Among the originals in North America, see http://www.greenbirding.ca/ for some background if you are not yet familiar with it.
Some other good links about green birding, from:
Ted Floyd: http://blog.aba.org/2010/10/green-birding.html
WI Green Birding Challenge: http://wisbigby.blogspot.com/
Urban Ecology Center's Green Birding event:
Yahoo Groups BIGBY: http://groups.yahoo.com/group/bigbybirding/
Green Big Day: http://greenbigday.org/?p=387
And, a slightly different tack: