SevenCubed - 7:25 pm on Dec 3, 2012 (gmt 0)

I like the google tool for assessing page speed and mobile browser compatibility. You can start by putting in the desktop URI version then when the test is presented you can click on the mobile tab to get the mobile worthiness score as well as see what the site will look like when all scrunched up for a mobile viewport (assuming you use CSS to allow your pages to shrink in width for mobile; max-width:960px; property becomes 480px in mobile). https://developers.google.com/speed/pagespeed/insights