rstore - and other Web-only businesses, such as the television rental firm CampusTVs - offer alternatives to descending on the college town retailers during those hot and steamy campus move-in days in August and September.DormCo carries about 4,500 products, including more than 210 comforters, 100 lamps and other lights, 80 futons, loungers, benches and other seating, and customized products such