I would never get a 7D over a 40/50/60D camera: lack of built-in flash ("speedlight") is the issue. The danged thing is simply to useful to be without. Yes, I have a very good external speedlight, but it's not always with the camera.
Still.. full-frame is very tempting.
Actually 7D comes with a built-in flash, and is not full-frame. In current Canon line-up, 7D is actually the successor of the 50D, while 60D has been repositioned below to fit between 7D and 550D.
But I see what you're saying. 7D looks very tempting now. I just wish it had a flip LCD screen.