Please Review: Button Creator
The site is built in a run-of-the-mill WordPress site, but all of the tools I put were handcrafted by me. There are a number of generator scripts I have been tinkering with that will generate CSS Sprites and even Sliding Door Sprites.
I still have some issues with some of the scripts and will be expanding the site as time goes on...
The CSS Sliding Door Sprite page is cool I think...
Worth a look if you are not familiar with them!