Microsoft’s Bill Gates has announced new junk e-mail filtering technology called SmartScreen. AP reports the technology will use algorithms to judge whether incoming e-mail messages qualify as junk e-mail and filter them out before they get to the end user’s e-mailbox.More interesting, Gates demonstrated Microsoft Research’s Stuff I’ve Seen project, which is developing a tool for rapidly finding material that users have seen ? whether it was an e-mail, Web site or document. The tool is not to be incorporated in any products anytime soon, but shows people some of where Microsoft’s billions of dollars in research is going.