San Francisco--Halsey Minor, the Internet media wunderkind who founded the technology news site CNET Inc., San Francisco, has stepped down as CEO of the company. He'll remain as chairman, but give up day-to-day operation of the Net news bureau. Replacing Minor is longtime ally Shelby Bonnie, a former New York investment analyst and CNET's first major investor. The move frees Minor to focus on developing strategy for CNET, while former CFO and COO Bonnie concentrates on executing business initiatives. Since Minor established CNET as a force to be reckoned with in the online news arena, it has been often speculated that he could eventually wind up at a TV network, large publishing company or film studio. The changes are effective immediately.