Facebook finally goes public today in the biggest IPO in Silicon Valley history. The market valuation will surpass $100 billion; that's more than well-established companies like Disney and Kraft.

What’s the cost of an iPhone? $200, if you pay for the rest of it through a two-year wireless contract. Now T-Mobile plans to upend the business model, asking customers to pay the true cost of the phone, and probably lower monthly wireless bills. Will their plan work with customers?

Forty percent of politically appointed envoys are big campaign donors. And unlike career diplomats, they get posts in desirable destinations, like Europe and the Caribbean. Caroline Kennedy's potential appointment in Japan would have more challenges.

Goodwill reads like an afterthought in a company's annual report. But it's often the most important component of a company's operation, as Sr. Producer Paddy Hirsch explains.