There are other sites that offer cross browser testing as well. But the features of Meer Meer to visualy layer the results from different browsers, and being able to work with local content through dreamweaver is great
(weird name for everyone who understands Dutch, it would translate into "more more")
http://ajaxian.com/archives/meer-meerMeer Meer is the code name for a new hosted service that allows Web Pros to view their content on a variety of different browsers and operating systems without requiring them to install anything other than the standard Flash Player. The inspiration is easy. We spend a lot of time with our customers and cross-browser compatibility consistently comes up as the #1 issue unprompted. It’s a real pain and we wanted to help solve it.