The Wardman Wire

Browsershots.org offers a service which will display screenshots of how your website will appear in a wide range of different web browsers:

What is Browsershots?

Browsershots makes screenshots of your web design in different browsers. It is a free open-source online service created by Johann C. Rocholl. When you submit your web address, it will be added to the job queue. A number of distributed computers will open your website in their browser. Then they will make screenshots and upload them to the central server here.

The service displays thumbnails of your website after you enter the web address into a queue and return to the site a few minutes later.

There are options to check the appearance with different screen sizes and colour depths, and with Javascript, Flash and Java turned on or off.