SiteScore - performs hundreds of checks on your website, including search engine placement and validation
Pingdom Full Page Test - downloads your page and reports the overall download time for each component of the page. Using the results, you can see how the number of images, style sheets, JavaScripts and other other objects on the page affect the overall response time. As the test is run from the US only, the times in Australia will be much faster, but this is still a very useful test for the purpose of page-to-page comparisons. Try www.metawerx.net, or wiki.metawerx.net, and then your own URL.