Disney’s Buena Vista Prods. has named David Stone VP of development, focusing on nonscripted programming.Stone will develop concepts for talkshows, gameshows and reality shows and pitch them to the three main outlets: broadcast networks, cable TV channels and TV stations offering fare in firstrun syndication. Stone reports to Ann Lewis Roberts, senior VP of BV Prods. and senior VP of alternative programming & development for Soap Net. Before Buena Vista, Stone was head of development for Rocket Science Laboratories.