Dragon #416 is live, here. (DDI subscription required)
In a twist from the past, rather than posting separate articles as separate PDFs, the whole magazine is in one PDF. This month's Dark Sun entry:
Eye on Dark Sun: The Withering Ones, by Rodney Thompson
Kalak kept a horde of zombies hidden below Tyr. Now that he is dead, do these undead horrors pose a threat to the city above?