what we need now is a system that makes it easy to test websites cross browser. There are websites out there that aim to do this. Some of them are:
All of these services, however, only allow you to get a screenshot of the website you are testing. This is great if you are just testing a static page, but horrible if you need to test interactivity. More and more websites are no longer static pages, but dynamic AJAX applications. There are some services that let you use remote computers to test websites in different browsers, but you need a blazing fast net connection in order to see animations and the like that are increasingly popular in websites. Another downside to these services is that they usually cost a good sum of money!