Google just released Closure, which is a compiler to minify JavaScript.
On the product site, it says \"The Closure Compiler has also been integrated with Page Speed\".>
"Page Speed 1.4 Beta integrates the Closure Compiler to minify JavaScript files automatically. However, you will need to download and install the Page Speed Beta and Closure Compiler separately."
http://code.google.com/speed/page-speed/download.html
I haven't installed this version yet, but I'm fairly certain that Page Speed will present you with compiled code in its optimization recommendations.