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Metrics firm ComScore reports that 132 million unique visitors logged onto Facebook in June 2008, up from just 52 million in June 2007. 117 million worldwide users visited MySpace during June 2008. Its Facebook's first definitive traffic victory, from a source advertisers actually pay attention to, over MySpace. Way down on the list at No. 6 — past the fast-growing Hi5, past still-kicking Friendster — there's AOL CEO Randy Falco's $850 million social network, Bebo, which saw 24 million visitors in June.