Sorry, only Apple will know that, Rob; and even if we knew, nobody would be allowed to post it here, before the raw support has been released.
Keep checking this link. Apple - Aperture - Technical Specifications - RAW Support
I'm waiting for the Aperture update so I can start playing with my pics.
I can understand, that you are eager to try your new camera - try Adobe's DNG converter, while you are waiting - http://www.adobe.com/support/downloads/product.jsp?product=106&platform=Macintos h
or shoot rwa&jpeg and set the Import panel to import raw&jpeg, with the jpeg as original. YOu can change that later, when the raw support has been released, and use the raw files you imported.