Pinterest

Pinterest is the new darling of the social media world. Users—over 10 million of them—‘pin’ digital images they like to their site, where others can browse and comment. Pinterest has run into recent issues surrounding potential copyright infringement, and now, a new problem has emerged: what should they do about a wave of pro-anorexia images and comments on the site?

To the list of weird-sounding hybrid words of the digital age, like Googling and tweeting, we can now add "pinning." As in Pinterest. It's sort of an online scrapbook or bulletin board, and it's one of the fastest-growing websites in history.

Last month, more than 10 million unique visitors signed on to Pinterest. But some of them, like Billy Winburn, are still trying to get the hang of it. At an office in Alexandria, Va., Jennifer Folsom, who works a few desks away, is walking him through the process.