Now that they won't be subject to San Francisco's payroll tax on stock options, Facebook gaming company Zynga is ready to open up to outside investors. AllThingsD reports that the SoMa-based makers of cartoon farming simulations for children could go public in the next week. Last year, the company signed the biggest office lease in San Francisco since 2005, while reportedly turning in over $400 million in profit.

Assuming the rumors are true, Zynga will join Mountain View-based LinkedIn, which went public last week, in what is expected to be a landslide of public offerings from tech companies that ends in a promised land where Groupon and Facebook stock are traded out in the open. Combine that with CEO Mark Pincus' plans to grow his company to something the size of, and you're looking at some pretty good conditions for Dotcom Bubble 2.0: Revenge of the Farmvillains.