With the opening of the Pennsylvania Soup & Seafood House, Doylestown, already a dining destination, added a new star to its culinary constellation. Months before it opened, the buzz on the street was that “the soup guy was back.” The “soup guy” is Keith Blalock, who a couple years back ran the Cyber Stop Cafe on W. State Street, wowing his customers with his liquid creations and developing a loyal following.