I used good old "Hide" command in beta 6, instead of Virtue. Not as fancy, but quick and no virtual desktops to worry about (I don't like them).
Hiding is however also broken in the RC. Both because Parallels has locked up the key command to hide, and because Parallels goes flickering out of full screen and into window mode when I do it.
--
I understand the focus on making the guest OS experience as complete as possible, but really - if I wanted that I'd go dual-boot. Parallell is the keyword for your advantage, or at least the part that attracts me with a VM solution. The experience of having Windows and MacOS on the same machine, at the same time, and being able to switch instantly and seamlessly between them.
All in all, what I'd really like is to have Parallels boot Windows into fullscreen without changing resolution. When Windows is running I'd like a global hotkey to Hide Parallels/Windows (instantly), and continue with my Mac apps. And in the same manner I'd like to instantly switch back to Parallels in full-screen and continue working in Windows.