Seattle-based Estately, an angel-backed, online real estate search site, has tied in "Walk Scores" into its site, the firm said this week. Estately said it is using "Walk Score" home ratings from FrontSeat, to help buyers figure out homes which have easy access to local shops, parks, public transit, schools, and workplaces. Walk Score also offers its ratings on its own web site, as well as other real estate sites like Zillow.