This was the topic for the meeting we never had because of the giant San Diego power blackout of September 6, 2011.
Here is the “This Week’s Mtg” post for that meeting. It contains the usual background information, discussion questions, and links. I’ll do a brief intro.
[Update II: No one has yet clicked on the old post. Please do so; there are some great links!]
[Update: Is marijuana legalization about to go mainstream?]