Wherever possible & useful, Adobe apps try to share code libraries that enhance integration. By picking up Photoshop and Illustrator libraries, for example, Flash CS3 is able to import & convert these apps’ files, much like After Effects, Premiere Pro, and other apps that use the libraries.
InDesign has long been able to place PSD and AI files, even turning on and off layers, applying layer comps, etc. to reconfigure files on the fly. In CS3, however, InDesign has also integrated the code that enables Photoshop layer effects (glows, bevels, drop shadows, and more). This means that you can apply these effects to native InDesign artwork, making it possible to apply & adjust effects without bouncing back to Photoshop. Over on CreativePro.com, Anne-Marie Concepcion & Pariah Burke talk about ways to take advantage of these capabilities.
If there are other places you’d like to see the apps share code, please let us know.