In case you've missed it:

measure-page-load-time-with-site-speed

We all know that improving the page speed is one of the SEO basics. Google Pagespeed is a nice thing, but now there's a way to track the page load time within Analytics :D YAY! For the asynchronous javascript call, it's as simple as adding _gaq.push(['_trackPageLoadTime']); to your code :) nice, isn't it?