He's one of Lehman Brothers' highest profile critics, a man who has bet heavily against the firm. A real thorn in the firm's side, particularly for Erin Callan, Lehman's CFO. David Einhorn, 39, of hedge fund Greenlight Capital, has been making the media rounds with his analysis of Lehman Brothers. Of course, he has a lot to gain by creating uncertainty and doubt. Some think he's acting recklessly. In his mind, he's on the side of angels. He's certainly no stranger to this sort of media firestorm. He's got a book out by the way, "Fooling Some of the People All the Time." The SEC once took a look at his activity during his battle with Allied Capital. It's fair to say that his campaign, for better or worse, is working. There is a lot nervousness on the Street right now. One analysts says that counterparty worries have led some firms to reduce trading with the firm, notes MarketWatch. That my friends is ominous.  

For more:
- here's Einhorn's latest appearance on CNBC
- here's the MarketWatch article

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