More from Facebook's S-1: No details are provided on the expected IPO valuation. R&D...

|By:, SA News Editor

More from Facebook's S-1: No details are provided on the expected IPO valuation. R&D spending rose 169% Y/Y in 2011 to $388M, while SG&A spending rose 132% to $707M - both figures easily outpace revenue growth. The company claims 845M monthly active users (MAUs) as of year's end (+39% Y/Y), and 425M mobile MAUs. Zynga (ZNGA) represented 12% of Facebook's 2011 revenue. ZNGA +2.8% AH. (S-1 filing)