If you're going into plugin route, then Java applets can already do OpenGL without any hacks, and will blow away anything that Flash can do. Quake 2 has already

If you're going into plugin route, then Java applets can already do OpenGL without any hacks, and will blow away anything that Flash can do. Quake 2 has already been ported, for example (http://download.java.net/javadesktop/plugin2/jake2/ http://download.java.net/javadesktop/plugin2/jake2/). But that's not really the point, is it?