Parallels has released an update to Parallels Desktop 7 for Mac that includes one-click ability to download and install the Windows 8 developer preview from the Parallels Wizard.
The new Parallels Desktop 7 build 7.0.15050 is available now by selecting the Parallels Desktop menu, then Check for Updates. The update also includes the following improvements:
° Install OS X Lion using Install Lion.app;
° Support for Ubuntu 11.10;
° Improved full screen experience with a new option allowing users to scale the virtual machine screen to fit the visible screen area while retaining the resolution;
° Improved support for non-English keyboard layouts;
° Improved migration of the recent Linux versions from a PC to a virtual machine on your Mac
More information is available at http://kb.parallels.com/112617 .