Secrets Spilled by the Facebook IPO

Facebook has officially filed its 150-page S-1 with the SEC, which means a boatload of new details about the company are officially out in the open. Some things you didn't know before, but do now, by way of the Los Angeles Times, Huffington Post, and New York Times:

• Mark Zuckerberg's annual salary will fall to $1 in 2013, a la Steve Jobs, but this year he'll collect a $600,000 salary, an increase of $100,000 over last year. (Of course, salary, schmalary: He could be worth as much as $28 billion after the IPO; this year's salary is .002% of that amount.)

• But Facebook has taken care of some other things for Zuckerberg: It pays for his "security personnel," and footed the bill for a home security system.
• Facebook also allows Zuckerberg and COO Sheryl Sandberg to use private planes for business purposes, to maximize "such executives' productive time and ensures their quick availability." Bonus for Zuck: Family members and "others" are permitted to accompany him, and personal use of the planes is considered Zuck's "other compensation"—which totaled $692,679 last year.
• Some 85% of the company's revenue comes from advertising. More interesting: 12% comes from Zynga. Last year's revenues: $3.7 billion.
• Of the 845 million people with a Facebook profile, 483 million log on daily. In Q4 of last year, users posted an average of 2.7 billion likes and comments every day.
• David Choe, the graffiti artist who painted murals on Facebook's walls in 2005, was offered a few thousand dollars, or stock worth about the same, for doing the job. Those shares could be worth more than ... $200 million.
• Another person who will make out more than OK: Daddy. Zuckerberg's dad was awarded 2 million shares "in satisfaction of funds provided for our initial working capital."

(More Facebook stories.)