The casual-game-making monolith that is Zynga has just filed an S-1 with the SEC saying that it wants an IPO as soon as possible.

Zynga estimates initial sales in stock to be roughly $1 billion, despite rumors and speculation from other sources believing the sales to be from $1.5 to $2 billion.

“By offering our shares to the public we hope to enable Zynga to invest more in play than any company in history,” Zynga CEO and founder Mark Pincus writes in the filing. “To accomplish this, we will continue to make big investments in servers, data centers and other infrastructure so players’ farms, cities, islands, airplanes, triple words and empires can be available on all their devices in an instant.”

Looks like Zynga’s kind of a big deal, to say the least, what with this and the massive amounts of revenue they get from their games.

No idea how long Zynga’s gonna stay this profitable, but they’re definitely blowing up.

[Gamasutra]