You could assign a keyboard shortcut to move the app with focus to a specific desktop. Can't find this in Lion. Anyone know if it's still possible?
I figured out how to do this.
- Open System Prefs > keyboard
- On Keyboard Shortcuts tab choose Mission Control
- Enable the "Switch to Desktop..." shortcuts
- Now when you click on a window and perform the Switch to Desktop keyboard shortcut it'll move that window to the desktop
Guess there is a mouse component to this, so it's not pure keyboard. But I find it way easier than dragging windows around in mission control.