SQL Server 2012 (codename Denali) - Virtual Labs are ready. Just click and start working on a pre-installed SQL Server 2012 virtual machines for free :)
Virtual Labs enable you to quickly evaluate and test Microsoft's newest products and technologies through a series of guided, hands-on labs that you can complete in 90 minutes or less. There is no complex setup or installation required, and you can use Virtual Labs online immediately, free.
Here's a screenshot that I took to show you how does it looks like when working on those lab machines :
