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Microsoft and several large media companies — Disney, CBS, NBC Universal, Fox and MySpace, Viacom and Dailymotion — will announce plans this morning to use technology "to eliminate copyright-infringing content uploaded by users to Web sites, and block any infringing material before it is publicly accessible," according to a Wall Street Journal report. The Journal says Google, which separately announced its own automated piracy detector yesterday, isn't part of the group.