About a month ago, I told about a free web service that will render a webpage in multiple browsers and test the functionality. I couldn't believe that there is no service like this on the web, still I couldn't find it (looks like I haven't event searched for it).
Now I found it: Browsershots
Example: Sreenshots for Inazawa-Church.com
Of course, you can't check the functionality (I think that's impossible), but it makes nice screenshots.