Useful article talking through several easy-to-follow big data scenarios in enterprise.  

Thanks Jay -- lots of useful real world examples.

I do note that one can do A/B Testing without a lot of Big Data machinery:

Even Zynga's artists use data when designing new features. In traditional test marketing, a game designer might test different versions of, say, a polka-dot cow with a focus group. Zynga's artists can draw two different versions and put both in the game to see which is more popular with players.

But the point is still a good one: Don't guess. Use data.