The ImageViewer2 class has been updated again. It now uses the mx.transitions.Tween class to handle the alpha and resizing animation. New methods allow you to set the length in seconds and the type of easing used. This allows for customized animation.
Glad to see your site is up Mitch!
This is great. Theres a great example of the new built in flash exporter from Photoshop CS3 which breaks up images into a grid for zooming into high res images.