The prestigious Public Policy Institute of California (PPIC) published a statewide survey this month showing that 38% of likely 2010 voters in California consider legalizing marijuana a "very important" issue. Another 24% consider the issue "somewhat important." This includes voters who are passionate about ending prohibition and voters who strongly support continuing the war on marijuana. While the 38% figure is lower than other issues expected to be on next year's California ballots, it's worth…