Came across a MacWorld article that talked about a new product from Adobe called BrowserLab. It lets you render a web page in the various browsers and see how they look. So you can see a page in Safari and have it right next to how it looks in IE. This also works on Mac as well as Windows. I haven't tried it yet as the page requires Flash 10 and I wasn't up for doing that. Let us know if you check this out and give some feedback.