Like a Vaudeville act of old getting ready to take it to New York City, today's protester has got to ask himself if he's ready for the big time when he comes to San Francisco. We've got no shortage of expert, home-grown demonstrators, and budget season has distilled the best of the best. So, were a few hundred Central Valley agricultural advocates steamed over a lack of available water up to the task? Our snap judgment is -- not exactly. Ostensibly here to buzz Sen. Dianne Feinstein's office y