Yesterday was April 20, otherwise known as 420, a significant number in cannabis culture. The legend began at my high school. (San Rafael High was also the school attended by the guy who played Warren Coolidge on The White Shadow). A lot has changed since 420 originated in 1971. Pot has gone mainstream and is quickly going legal. And now it’s going high tech. Wired’s Mat Honan on how Silicon Valley entrepreneurs are rushing to cash in on cannabis.

+ MoJo: 24 mind-blowing facts about Marijuana production in America.

+ Village Voice: A day in the life of your friendly neighborhood weed messenger.