GFX: GeForce 8000 or Radeon 2000 series with 512 MB RAM
CPU: Core 2 Duo or Athlon X2.
RAM: 2 GB
Internet: ADSL 3 Mbit
Update: - Blizzard sends word that these specs are not confirmed. Just so you know! These are the specs I found so yes perfectly doable. As mentioned on the youtube vid, a Quad core i7 is seen as a 8 core in Virtualbox because it is dual threaded. The only limitations on such a "dual" system would be unsuring that the graphics card has two outputs. When looking at virtualization remember that it's really a resource manager that can split up a system into smaller portions a needed. Hardware is the only limitation and not even machine startup should prevent home usage of Virtualization. /the problem is that it may require separate user privileges to be able to launch the virtualization application. My laptop as an example in the guide, can easily be split into two systems for me and my wife but allas I do not have a video outlet which makes it a problem. The fact that it is meant to be portable does not bother me.I use Ubuntu cloud so my data is everywhere.