>Therein lies the major difference - possession of less than 25 grams is a misdemeanor. I don't know of a single person who ever went to jail for smoking pot.

Well, what exactly do you mean went to jail? THere could be a difference. Around here, if you're caught with a pipe or any amount of cannabis, they take you to the station and put you in a cell until you bail yourself out. You may never get a jail sentence when court comes around, but you were put in jail.