I'm proud to announce the lauch of spritewizard.com a web service that allows you to create and maintain css sprites with an easy drag and drop interface. I created SpriteWizard because I could never get all of the images from a designer at once. Having a simple web interface that manages all of that for you. So please check it out and let me know what you think.
Update, I shuttered sprite wizard after relizing that most developers would like a script to build sprites, not a fancy drag and drop interface.