Apparently there was a sneaky rumour going around the internet claiming that Naughty Dog was looking to hire individuals with experience on developing on the Xbox 360 - inevitably leading to the ever wonderful debate of whether the developer would ever go multiplatform.
Naughty Dog's buddy, Insomniac Games, have done so, why can't they? Well, they aren't.
"Where is this rumor? Haven't seen it. We're also wholly-owned by SCEA since 2001, working on SCE consoles throughout our history".
Well there you have it, Naughty Dog's a "wholly-owned" subsidiary of Sony, so they won't be making any multiplatform games any time soon. Rumour squashed.