This will be out on Tuesday. Why? Apple has repeatedly stated that Aperture 1.1 will be released before the end of March. Aperture requires OS updates to include new RAW conversions. Aperture 1.1 supports Nikon D200 RAW files.
So for Aperture 1.1 to be released in the next seven days... 10.4.6 needs to be released first. History tells us that OS updates generally fall on a Tuesday.
http://www.apple.com/aperture/update.html says:
1) 1.1 Supports new cameras (thus requiring a Image Core OS Update from 10.4.6)
2) 1.1 Scheduled for release in March
If you've observed the rabid users in the Aperture Discussion threads at Apple Support-- you'll know they've received numerous confirmations that Aperture 1.1 (Universal) will be released this month... and that RAW processing is still handled by the OS and not the application. You have to have an OSX update to support a new camera.