Microsoft has made available its first developer demos for Internet explorer 9 which can be downloaded from www.IETestDrive.com.
This doesn’t have any back button or a rendering interface and is infact based on the Microsoft’s own Java script engine code named “Chakra”. It has no builtin security as of now and is a engine for developers. It supports HTML5, CSS3 and SVG2, the more emerging web languages.
However, its a heartbreaker as it wont run on XP machines and will need vista sp2 to run as expected.