From http://github.com/simplegeo/polymaps http://github.com/simplegeo/polymaps "Browser Support: Tested in recent Webkit browsers (Safari 4+, Chrome 6, Webkit

From http://github.com/simplegeo/polymaps http://github.com/simplegeo/polymaps "Browser Support: Tested in recent Webkit browsers (Safari 4+, Chrome 6, Webkit nightlies) Tested in recent Firefox browsers (3.6+) Optimistic about Opera, IE9, but not part of core testing yet. SVG is required, even for image display... in other words: if you can't require SVG, don't use Polymaps!"