One way to remove the spam from the top.
Garden design meets art and sculpture meets sustainability in Sonoma California.
http://www.thelateshowgardens.org/
While not local, this is certainly a thought provoking garden show worth the time of a virtual visit for those interested.
Two good photo reviews can be found here:
http://deviantdeziner.blogspot.com/2009/09/late-show-gardens-review.html