His first big score: The Internet phone service Skype, which eBay nabbed for $2.6 billion in 2005. Next: TellMe Networks, sold to Microsoft for $800 million. Most recently: Last.fm, which went to CBS for $280 million. CBS also joined Rimer's Index in a $45 million round for Internet-video startup Joost, the Skype founders' latest company.
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