SBS 2011 has gone gold with OEM’s expected to have them loaded for purchase sometime mid January 2011. For those of us who can download the .iso from TechNet you can build your test machine today. Just be prepared to use a 8GB Flash Drive or larger to create a bootable piece of media to install it. DVD’s are too small for the over 6GB .iso file download. How do I do that? Well to start head over to Tim Barret’s blog. http://www.nogeekleftbehind.com/2010/12/22/how-to-install-sbs-2011-with-a-bootable-usb-drive
Additionally I’ve tried a recommendation to build the bootable USB drive with the UNetbootin tool and it worked just as well as the very manual Tim Barret method. Expect the creation of the bootable USB drive to take well over 30 minutes once you click to initiate that process.