Just in case you haven't seen this yet, Sal Sogholan's Aperture-InDesign Integration Demo is a thing of beauty.

"Enhanced AppleScript support in Aperture 2.0.1 combines with Mac OS X functionality to provide a new level of interactivity with page-layout applications such as Adobe InDesign CS3. For the first time, Aperture preview images can be easily placed into another application's document while maintaining direct links to the related master images in the Aperture library. Placed previews can be updated as needed and even replaced with high-resolution exports in preparation for offset or direct-to-plate printing."

I'm in the process of tracking Sal down now so we can sit down and discuss the Aperture/AppleScript story these days. From what I can tell, it has a happy ending.