Parallels today announced its release of Parallels Desktop 3.1 for Mac, a feature update of its award-winning software that enables Mac users to run Windows, Linux, and any other operating system at the same time as Mac OS X on a single Mac desktop, without rebooting. This update includes: improved Coherence with deeper Windows integration, such as Exposé and transparent windows support; new Synced Windows and Mac desktop and user profile folders; and significant performance improvements and lower overhead.