NEW LOOK: MyShape, the online retailer that promises a flattering fit without spending time in stores, updated its Web site. Now, customers can shop by designer and invite friends to see their personal store. An “outfit builder” lets shoppers mix and match looks to create an outfit, similar to Polyvore. Expanded sections on personal style offer fall looks and wardrobe advice. MyShape matches customers to clothes via a questionnaire that assigns them to one of seven body types.