Derrick, it doesn't make any sense to use Aperture with Camera Raw, does it?
Aperture won't recognize any changes you make, so there'd be no versioning of any kind until you re-import a PSD or TIFF back into Aperture.
If you want to use Camera Raw--other than as a very rare case--then Aperture is not the right tool for you.
The question is: Should Apple spend time and money developing Aperture into a product that can use other companies' raw converters. IMHO, the answer to that question is 'no'. Apple should spend its time & money adding photographer-friendly features to Aperture.