Right after professional social network LinkedIn doubled its stock on launch day of its IPO, social gaming giant Zynga may be next. Rumor has it that the company currently valuated at $10 billion could file for a public offering with the SEC this week or next week the latest, according to sources.

From Reuters:

“Zynga could price itself higher than the $10 billion it was valued at in its latest round of funding, after LinkedIn’s stock more than doubled on its first trading day, underscoring rabid demand for Internet IPOs, the blog said.”

It has been known for some time now that Zynga, not to mention Groupon and Facebook, will be headed for an IPO soon. What was expected to be the coming months became days, though reporting of earlier-than-expected IPOs (such as in the case of LinkedIn a few months ago) has been proven to not always be definitive. Nevertheless, the public going of one company has been confirmed. Yandex, the largest search engine in Russia, has gone public today. The company priced its public offering at $25 a share. The company’s valuation at that price stood at $8 billion, and this number soared by 55 percent on its first day of trading to $38.84 at closing.

Yandex’s underwriters included Morgan Stanley, Goldman Sachs and Deutsche Bank Securities, and have the option to sell an additional 5.2 million shares to cover over-allotments.

Yet another company who is already gearing up for its public offering is Fusion-io. The flash memory solutions provider recently updated its S-1 SEC filing, and disclosed some of the names of its biggest customers, as well as sales figures and the fact it has become profitable this last quarter, ended March 30.