LAT In 90 Seconds -- Afternoon Edition

Un-Friend Us: From Joseph Menn: “Social networking sites, which let users create detailed profile pages and connect with friends, are becoming the hot new thing for identity thieves, both amateur and professional. As improved spam filters and skeptical consumers make bogus e-mail less successful, scam artists are taking advantage of the atmosphere of trust that exists within these online circles of friends.”

Ya-who? Yahoo Inc. stock plummeted this morning after merger talks with Microsoft Corp.