It seemed like a good idea at the time...
This does a couple of interesting things.
First, almost all of the dynamic css and dhtml that I see on the net involve manipulating the styles of objects on the page. This doesn't. It modifies the stylesheet itself.
Second, it's an ajax implementation so it's got that cool web 2.0 vibe. Once I find the business model for peer to peer collaborative eyedropping, I will use this to take on the growing cut-n-paste social network sites ( look out pastebin.com ! ).
Sadly, I doubt it works in any browser but Firefox. Not that it couldn't. I'm just that lazy.