This is my WordPress plugin which will help you make your Website more quick. It can grouping and packing Java Scripts and CSS. Also it makes fewer HTTP requests.
Download
http://wordpress.org/extend/plugins/js-css-script-optimizer/
Features
- Combine several scripts into the single file (to minimize http requests)
- Pack scripts using Dean Edwards’s JavaScript Packer
- You can move all JavaScripts to the bottom
- Combine all CSS scripts into the single files (with grouping by “media”)
- Pack CSS files (remove comments, tabs, spaces, newlines)
- Ability to include JavaScript and CSS files
- Network / WPMU support
Usage Recommendations:
- This Plugin processes only those scripts that are included properly (using “wp_enqueue_script” or “wp_enqueue_style” function)
- Uploads directory should be writable
- Read How to properly add CSS in WordPress
- If any script fails and shows error you can add it to exclude list or check “Strict ordering” option



I must be doing something wrong, ‘cos when refering to anything in my included js scripts I get “ReferenceError: Can’t Find variable XX”
Looks like this JS use global variables. You can try add to exclude list in the JS & CSS Script Optimizer Settings page.