Just in case you had any remaining doubts that Facebook is going public — a fact that Mark Zuckerberg's sister, Randi Jayne, profanely sings about in a video that's since been taken down — check out this job listing:

Stock Administration Manager
Facebook is seeking an experienced Stock Administration Manager to join the Finance team. This is a full time position located in our Downtown Palo Alto office and will report to the Controller.

The job requires experience working at "an international public company" and familiarity with a host of regulations that only apply to publicly traded companies. Anyone gone for an interview yet?