Santa Monica-based BetterWorks said today that it has expanded its services into San Francisco and the Bay Area, and is planning on opening up in New York and Boston soon. The firm--headed by Paige Craig--helps provide employee benefits and perks using web-based software and technology. Craig's co-founders include Zao Yang, the creator of Farmville, and George Ishii, co-founder of Geni and Yammer. BetterWorks did not give a timetable for opening up in New York and Boston.