MSDN 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.
No installation required 🙂
Get your hands on Visual Studio 2012, TFS 2012 ....
it's free, you can learn following the step by step instructions and we fire a virtual machine for you through your browser ... nice 🙂
list of labs: