Pre-Marketing: Facebook's biz model

* Chris Dixon: Facebook's business model

* Breaking: Facebook increases IPO size

* Jeff Atwood: Please don't learn to code

* Sallie Krawcheck: When high-return bank businesses go bad

* Morning Call: U.S. futures point lower, European shares slide and the Nikkei loses 1%.

* Rip Emerson: What are you worth to Facebook?

* Pinterest of the day: Sad Jamie Dimon

* Aubrey fallout: Chesapeake workers put at risk

* Expansion? KKR is talks to buy into hedge fund manager

* Bubble siren: Seniors clamor to invest in Facebook IPO

* Hypocrite: Curt Schilling's gaming company can't pay its debts

* Claire Suddath: 5 music biz lessons from Led Zep's manager

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* Post-Blackstone: Pete Peterson has spent half a billion as a deficit hawk