BitTorrent, the San Francisco company whose file-sharing technology has frequently been condemned by film studios and TV networks for "facilitating" Internet piracy, is expected to unveil today (Tuesday) a new system for streaming video over the Internet in high quality. The Delivery Network Accelerator will reportedly rely on users' computers essentially acting as multiple streaming servers, thereby cutting costs and making it possible for users to view videos over their entire computer monitors with quality approaching that of HDTV.