Zynga filed for its IPO. The social gaming giant had nearly $600 million in revenue in 2010, and made nearly $30 million in profits. First quarter 2011 revenues were way up, to $235 million. The company doesn’t break out advertising revenues, so presumably almost all of this comes from the sale of virtual goods. Early commentators zero in on Zynga’s Facebook dependency. Zynga doesn’t even get a discount for being Facebook’s largest Credits user. Derrick Harris takes a look at Zynga’s cloud and big data strategies. Earlier I wrote about what Zynga might do next, both to diminish its reliance on Facebook and build out new businesses. I’ve also looked at network effects in social gaming. Here’s Zynga’s S-1 if you want to poke around.