You got to love Microsoft. They are giving away their virtual pc software for free. Check out the listed OS support, notice the OS/2 Warp. Yeah that's right, all you warped freaks out there can now run OS/2 in a free Windows vm software system. I hear the rush of the crowd.
In a small footnote at the bottom of the page, they did mention that it will support most x86 operating systems. So if you wanted to do something useful like run Solaris or a Linux variety you could.