Your humble coauthors stay informed of the latest trends about social media, often by attending events where bloggers, marketers, communication experts, and brands try to build mutually beneficial relationships. At these social-media watering holes, the discussion inevitably turns to the fastest-growing market in America: Latinos. Basically, everybody wants to know...

Alicia Morga wants to know how you're feeling.

The founder and CEO of Refleta.com isn't just making small talk. Her company's iPhone app, gottaFeeling, prompts users to track their emotions, which they can share via social networks.

However, gottaFeeling is more than some narcissistic toy that...