I too would recommend taking a look at
http://combine.riaforge.org. It's a really slick way to have your webserver combine and compress multiple JS/CSS files on the fly when the page is requested.
I've been using this library for a little while and really like it. I've made a few enhancements to the library to fix a few bugs and add a few nice enhancements. If you're interested, my updated library is available at
http://github.com/RichardDavies/combine.cfc/tree/m.... (I've submitted my code to the original developer, but those changes haven't all been integrated back into the main library yet.)