How 420 Got Its Start

Although I don't actually like the stuff very much personally, I think it's long, long past time to legalize it -- and I've never quite understood why pot smokers place such mystical significance in the number 420.  The Waldos' story is as likely as anything else, I suppose.  I'm just disappointed that the marijuana legalization initiative will likely be called Proposition 19 instead of allowing me to become a "Californian For 20."  Come on, Legislature, we need another bond measure or something on November's ballot!