Tim Harford is one of the most interesting "popular" economists currently writing (by "popular" I mean those that have had some success in bringing economics to the masses). His regular column for the Economist called "Dear Economist" is one of my favorite reads. In it he answers common questions (like how to deal with an arranged marriage, or whether to save for the future) in a Miss Manners style using economic reasoning.
For those of you who enjoyed Freakonomics, I'd recommend his book"The Undercover Economist: Exposing Why the Rich Are Rich, the Poor Are PoorÂand Why You Can Never Buy a Decent Used Car!" -- it's a great read, and would also make a good stocking stuffer.
Patri Friedman at Catallarchy has just posted an interview of Harford, which you can here.