Via Micro Persuasion comes news that CNET has launched a Web-based RSS news aggregator called Newsburst. The site, now in preview, will compete with Bloglines and Rojo, notes Micro Persuasion’s Steve Rubel. Newsburst describes itself this way: “Newsburst is a personalized tool that tracks virtually any type of information on the Web: news, blogs, shopping lists, weather, search results, alerts, auctions and more.”