Today in Tech: How Facebook’s IPO made one graffiti artist a millionaire by JP Mangalindan @FortuneMagazine February 2, 2012, 8:08 AM EST E-mail Tweet Facebook Google Plus Linkedin Share icons Fortune’s curated selection of tech stories from the last 24 hours. Sign up to get the round-up delivered to you each and every day. * As speculated, Facebook filed an initial public offering yesterday. The social network, which now reports 845 million monthly active users and net income of $1 billion on revenues of $3.7 billion, plans to raise $5 billion. Here’s the letter from Mark Zuckerberg included with the S-1 Registration statement. (Fortune and Wired) * If Facebook aims for a high-end valuation of $100 million with its IPO, Zuckerberg’s stock in the company would be worth $28 billion. Meanwhile, graffiti artist David Choe, who decorated the company’s office walls and opted for stock over cash, will likely find himself $200 million richer. (The Wall Street Journal and The New York Times) * Meanwhile, colleague Miguel Helft profiles the man behind Facebook’s IPO, CFO David Ebersman. (Fortune) * Though AOL’s earnings declined to almost $23 million, down significantly from nearly $66 million, the dip still exceeded analyst expectations. (The New York Times) * Social curation network Pinterest is growing so rapidly that now it’s driving more referral traffic than Google+, Reddit, and LinkedIn combined. (GigaOm) * According to an Amazon filing, daily deals site LivingSocial lost significantly more than it made last year: $558 million in losses compared with $245 million in revenues. (GeekWire) Don’t miss the latest tech news. Sign up now to get Today in Tech emailed every morning.