We tried a small Shanghainese/Sichuanese restaurant in Mountain View last night. I can't remember the name, but it is in the shopping center on the corner of the Central Expressway and Rengstorff. It has been around for about five months, but it wasn't very crowded. The food, however, is very good. We tried the xiaolongbao, which were juicy and flavorful; shanghai fried noodles, which were also flavorful; dry-fried string beans that were yummy -- not over cooked or greasy; and the lion's head (pork meatballs) served in claypot, which were tender and pretty tasty, although not as good as ones I've had in NY. They have northern style dim sum on weekends. Definitely worth a try. Btw, they prefer cash (and request payment in cash on the front of the menu).