By the end of next year Blockbuster plans to install some 10,000 kiosks in supermarkets, convenience stores, drug stores, malls, fast-food outlets and the like at which customers can rent or buy DVDs, the company said Monday. In a joint news release with NCR, which is providing the machines, Blockbuster said that the kiosks will initially only provide DVD rentals but will eventually allow consumers to purchase DVDs and video games. The company is challenging Redbox, owned by Coinstar and McDonald's, which currently operates about 9,600 DVD kiosks nationally.