Don't know if anyone will find this handly, but here's a CSS processor that I wrote that allows me to nest CSS Blocks, and various other things, making for an easier to maintain CSS file.
Warning: I'd recommend caching the results since I didn't have a need to optomize it for speed.
Things that it includes:
*Nested CSS Rules
*Allows for // comments
*Removes comments (so put them in at no cost)
Please let me know what you think