Remember that when a hot new investment comes to market, the small investor stands last in line. First served by the IPO will be the firm's founders and other investors who took early risks during the start-up phase. They already have a big equity stake in the firm, and they often see the value of their holdings surge as the IPO occurs.
Next at the trough will be financial firms and privileged investors. They can get in at that "offer price" in the neighborhood of $36 per share.
Last, and least, is everyone else.
When trading in Facebook starts on the Nasdaq market under the ticker symbol "FB," financial pros expect the shares to open significantly higher than the official offer price. If that's the case, you'll need to decide whether that higher price feels worth it.