Windows 7 Tip: 
There’s a nice piece of web application I found on the web Browsershots. Browsershots helps you to make screenshots of your website on different browsers across different Operating System.
You can see how your site looks like using Internet Explorer, Mozilla Firefox, Opera, and others. This is useful for website owners. It allows them to check whether their website’s design looks good for everyone.
All you have to do is type in your url and click start. Your request will be put on queue. It took me about an hour before these distributed computers start showing me screenshots of my blog in various browsers. Slowness in generating screenshots is perhaps the only drawback of this service.
nice found !! but it is very slow… at times its giving timeout error and at times xml parsing error. You are right !! Its damm slow… i tried , but till now only errors.
Its a good site and I had used to check my blog previously and as said, its very slow to respond.