From a recent Kotaku interview with Microsoft’s Aaron Greenberg:

“We feel like our system has done very well for us in the current form,” said Greenberg, director of product management for the Xbox 360. “We have no plans for a slim.”

“We feel that we’re not even at the halfway point (of the Xbox 360’s life cycle),” he said. “That is something we believe in strongly. People have invested in these consoles, and we have massively connected communities and we have storage. I think what we did with the New Xbox Experience is a sign of what we want to do with the console.”

It looks like the rumors of a slim Xbox 360 are untrue, and with Facebook and Twitter making their way onto the system this fall, it looks unlikely we’ll see a hardware refresh anytime soon, instead having software take the main focus of updates from Microsoft.