Sometimes I have a bunch of open apps in one space, and I want to send one to another space. So, unless there IS a way to do it (then I will look down in shame), I was thinking they could add it to the Dock's pop-up menus for an application. So, you can right-click on, say, FireFox and go to Send to Space... and it shows you the list of spaces. Click on a space, and it flies it over. I'd imagine you'd actually stay in the space you are already in, and the app just flies away. Or would it make more sense to follow it? If there's no way to do this already... I'll also send this as a feature request to Apple. And yes, I know about the dragging between spaces. But sometimes there's a bunch of open windows in one application. And it's just quicker to use the imaginary Dock command.