With the Internet and social media, it’s nearly impossible to keep anything a secret. But for some companies, off-menu offerings and discounts for those in the know can be a potent way to build a devoted following. The most recent example of supposedly secret deals came earlier this month when Computerworld wrote that Verizon Wireless was offering mega-data plans only by request. (The company has since said that customers can find the plans on its website, although they're not readily visible.) Read on for some of the "secret" deals available to those who know to ask.