Question: Is there some utility or Service that will allow me to screen capture from a window or rubber band **directly** into Keynote **without first storing the document in a file**? 

I would like to do this with the "Services" command, if possible.

One way to do this would be to make the screen shot happen, then put the screen shot on the pasteboard, then do a paste command. But I am not familiar with the approach. Thanks!

Answer: 
`Cmd`+`Shift`+`Ctrl`+`4` will give you a magical pointer; you click-drag rectangle; the rectangle will then be screenshotted directly to the clipboard; switch to keynote and do `Cmd`+`v` to paste. rinse and repeat.
Grab.app in Utilities directory is the program you are looking for. It helps you make screen shots that can be saved in a tiff and included in keynote. What the real name of the Grab.app is, I can not tell, because in German it is called "Bildschirmfoto" (screen picture).