Parallels launched Parallels Workstation for Desktop, its first x86 virtualization software, back in September, joining VMware's proprietary Workstation and the Xen open source virtual machine applications. Parallels Workstation, which is also proprietary, offers similar features and performance to VMware Workstation, but at only $49, compared to VMware's $189 price. This month the company announced version 2.1 beta. I liked the user interface, the virtual machine wizard, and the price...