Westboro, Mass.--Switchboard Inc. has launched LocalClicks, a performance-based advertising service within its online yellow pages directory. The service attaches transactional links to local yellow pages listings, allowing customers to buy online directly from their search results. Advertisers can purchase three different packages under the LocalClicks program. According to the Yellow Pages Integrated Media Association, 66% of online yellow pages users make or intend to make a purchase after referring to Internet yellow pages listings. Switchboard reaches more than 5.5 million unique users a month.