You know who. (Photo: flickr.com/prospere)

Facebook’s 421,233,615 shares are opening at $38 each [Facebook]

Who’s getting paid today? [Fortune]

A picture of a Facebook share [Business Insider]

Facebook had a wacky hackathon last night! [VentureBeat]

How will Europe ever build the next Facebook? [New York Times]

Hong Kong trading platform offers $200 of Facebook stock to new users [TechCrunch]

Ostentatious wealth is frowned upon in Silicon Valley, which likes its millionaires in jeans and hoodies [New York Times]

There are more than 30 banks handling Facebook’s public trading debut, for fees of $100 million. What, exactly, do these banks do? The Guardian investigates. [The Guardian]

Adrianne Jeffries is the editor of Betabeat. Follow Adrianne on Twitter or via RSS. ajeffries@observer.com