I have written a small image class in php for the new content management system on elYsiun.com.
What it basicly does it resize and compress images to the values I give it.
A nice example is at:
http://www.elysiun.com/phpImageTest/image.php (the top image is original,… the other 3 images are calculated on page load).
Basicly this will make adding new items etc much much easier.