As described in the workflow thread, Apple has officially announced an upgrade to Aperture 1.1
Some marketing speak from the page itself:
1. Improved RAW Image QualityAperture 1.1 provides new, improved RAW decode algorithms that deliver next-generation RAW image handling. Thanks to the improved default rendering of RAW images from supported cameras, Aperture 1.1 yields significantly better image quality, results you’ll see in such areas as noise reduction, sharpening, and highlight recovery.
In short, RAW images have never looked better than they do in Aperture 1.1.
We'll see...
3. Auto Noise Compensation
Designed specifically to deal with noisy images resulting from high ISO or long exposures, Aperture 1.1’s new Auto Noise Compensation option automatically applies the optimal settings for noise reduction to your image. A real time-saver, Auto Noise Compensation takes into account the unique noise characteristics of each camera and dials in the optimal settings to produce a high-quality result.
Also of interest, apparently now it can open/save/export .PSD files with layering.