The Foodery has it in semi-regularly assuming you want to buy bottles, but their stock gets eaten up fairly quickly, you have to be fairly lucky to cop any.
In addition to Monks, which has the Damnation tapped as we speak, the Memphis Taproom in Fishtown, and Local 44 in University City both regularly feature Russian River products. It was at the Memphis Taproom that I first had Blind Pig... Oh sweet sweet Blind Pig...
In any case, the Foodery is the place to go for bottles, they have the best selection in the city, though the prices can be a bit premium. There are 2 locations, one at 10th and Pine and one at 2nd and poplar. They're your best bet for Blind Pig, or any Russian River in the city.