Well Photoshop is static and Flash is dynamic. I export any images in Photoshop to an appropriate compression, and split them into various images as needed. So if an image will be part of something moving, it has to be separate for animation, and so on.
Anything such as text, simple lines, that can be created in Flash should be rather than in Photoshop, IMO.
Also, I am always a fan of Flash being only the size that is required. If you have only a small section that is animated, then only put Flash there. Use HTML when possible.
jeremy - gnomeontherun
Educated questions often get educated answers, and simple questions often get simple answers.