Yes you can!!! It's part of Windows XP, if you are using XP. Check the box for "auto-hide task bar and "Keep the taskbar on top of other windows" in XP and in Parallels from OSX side under Applications "Show Windows Taskbar."
It'll then remain on top of ALL windows. That's the way I've been doing since the earliest release in 2.0 and works just the same in 3.0.
Last edited: Sep 14, 2007