The first release candidate of Microsoft's next operating system has now been released. Anyone who already has a Product Key from the Vista Beta 2 can use that and Microsoft will supply new Product Codes to new testers soon. Post back on how you get on, there are both 32bit and 64bit releases. Download it from here. Their download manager is trash for me with IE7 but you can use your own (just mine can't handle over 2GB).