Seattle-based nail salon Butter London, which offers a nontoxic product line, is rapidly growing its brand at airports, with locations in Sea-Tac International Airport and Sacramento International Airport, with plans to set up shop at Dulles International Airport near Washington, D.C., in spring 2008. The company's nail salons include huge black chandeliers and nail stations handmade by carpenters. Manicures are $20, pedicures $40.