Minifying Plugin – What Does WP Do?

Hey guys,

I’m working on a WP plugin to compile JS (with Google Closure), minify CSS and HTML, and combine Javascript and CSS files into just two files.

So, I know how to do all of this. That isn’t the big deal. What I’m curious about is what does WP already do or have built-in? It looks like WP does do some combining already, but not fully (for example, my plugin’s queued javascript file isn’t merged).

Any tips, tricks, or pointers greatly appreciated.

Thanks.