From Keith “Now that SharePoint Server 2013 has been released, I frequently get asked about ways in which a SharePoint 2013 lab environment can be easily built for studying, testing and/or performing a proof-of-concept.  You could certainly build this lab environment on your own hardware, but due to the level of SharePoint 2013 hardware requirements, a lot of us may not have sufficient spare hardware to implement an on-premise lab environment.”  Check out his post here to build your own SharePoint lab!