Show HN: My Fast CSS Sprite Generator

I've been working on a CSS Sprite generator for a couple of weeks in my spare time. It uses HTML Canvas and JavaScript FileReader to open local images without any zipping or uploads, and tries to make the CSS generation as easy as possible.

I made it because it is a tool that I wanted to have, and I am hoping to get some feedback from others now that it is functional.

http://instantsprite.com