You already did it Bill. You posted a message with the googlegroup address, or perhaps responded to Michael's. I imagine it told you that you weren't a member and it asked you to join.....and obviously you did, or the post would not have gone through.
On the other hand, I just enrolled through the group page to start with.....gee, I thought I might have been first, but see I was third. But then this is my sixth googlegroup, four of which I manage.
This is the easy part;-)
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Sanda
San Mateo Ecovillage
http://www.greensolutions.org/smcc.htmhttp://www.greensolutions.org/RawHoney
http://picasaweb.google.com/EcoSanda