Loopt announced today that it has partnered with Mobile Spinach to integrate location-based advertising into its social networking service. The new feature provides Loopt users with access to offers, coupons and discounts from local neighbourhood retailers. Users are informed about nearby offers based on their current location and directions and contact details for the retailers. Offers can be redeemed directly from the phone or can be sent via SMS or e-mail. The service is initially being rolled out in the San Francisco area with plans to add additional major metropolitan areas such as Los Angeles and New York during the coming months. Loopt is available in the U.S. only as a free download from the App Store.