BrowserShots.org

BrowserShots.org is a pretty nifty site for you web developers out there. I don't think it's perfect, but it at least gives you a pretty good representation of what your site will look like in all the popular browsers (and resolutions). The site just got dugg to the front page a day or two ago so when I tested it, there was about a 7 hour wait for the images. Still useful though.