#106: Use BrowserStack for Live Web-Based Cross Browser Testing
BrowserStack is the holy grail of cross-browser testing. Real virtual machines that you can run and test with right in your browser, including localhost!
Something I didn't mention in the video: the browsers come pre-loaded with all the development tools you would need. For instance, open up IE 8 and you'll get Firebug Lite, the IE developer tools, and Companion.js