Claus Wahlers has just released a public beta of his "Deng" browser. The "Deng" browser is a Flash MX-based browser. Here's a quote about what it is from Claus' website:
If you are on a machine with Windows OS, you can now download an early beta version of The DENG Browser! The DENG Browser basically is the DENG Modular XBrowser Flash MX Component wrapped into a Screenweaver C++ Shell. The final release version is going to support CSS2, CSS3 Namespaces, SVG Mobile Profile, XHTML Tiny, XForms, XFrames and much more. All of these technologies are already ready to use in this Beta (with limited functionality yet though.. Also note that this is not supposed to replace your Mozilla or IE6). The Browser also comes together with a set of sample XHTML, SVG and XForms documents.