Amazon.com and Target launched their jointly run online store Wednesday as part of a deal announced last month. The "Target store at Amazon.com" sells apparel, home furnishings and jewelry, among other items. As part of the five-year deal, Target will next summer begin using Amazon's order fulfillment, e-commerce and customer-care technology for its other online properties, such as MarshallFields.com and Mervyns.com. For more than a year, Amazon has been striking deals with merchants to oversee their e-commerce operations, usually getting a percentage of sales in return.