The Wall Street Journal has a fun story about the growth of the term "ninja" in job titles. Are you a ninja in your job?

From the article:

In 2009, the growth of "ninja" as a new job description far outpaced the growth of other trendy titles, according to LinkedIn Corp., a Web site that provides networking for more than 65 million professionals. While the numbers are still small on LinkedIn—some 800 current or former ninjas have public profiles on the site—their growth has skyrocketed past other fashionable careers such as "gurus" and "evangelists," says Monica Rogati, a scientist at LinkedIn who finds patterns in jobs data.

It's harder to quantify precisely what a ninja is.