The article must have been part of Warner Bros. PR strategy for the film, since it coincided with the premiere of some new footage at WonderCon on Saturday, where some of these details were also apparently revealed.
Money quote from the LA Times article for those interested in a synopsis:
There are more interesting details, including the description of a fight scene in a rotating hallway that apparently caused co-star Joseph Gordon-Levitt considerable misery, and Nolan's discussion of the origins of the film: he's interested in the metaphysical aspects of dreaming; the notion of lucid dreaming, and the idea that dreams are an alternate reality rather than just a mental state. It's not a new concept, but not many films have actually taken it at their subject.The film stars Leonardo DiCaprio as a specialist in the new branch of corporate espionage -- he's a dream thief who plucks secrets from the minds of tycoons after pumping them full of drugs and hooking them up to a mysterious contraption. The problem, though, is the land of nod can be volatile -- as can DiCaprio's character, Dom Cobb, who is a wounded dreamer after the loss of his beloved wife.
Best of all, it doesn't sound like Inception makes any concessions to its status as a summer blockbuster. I'm hoping for something as riveting and relentlessly brainy as The Prestige.