sure we do
I've done them on the DC9 and (pratt and whitney powered both) 737-200's.
we call them: Power BAcks instead of Pushbacks.
only things to be careful, area and people clear, and when you stop, you exit revverse thrust and go to forward thrust to stop...just hitting the wheel brakes might end you up on your tail skid....don't do it on wet/icy areas.
I even know of one guy who did it a little bit on a 767...but you aren't supposed to. Icy area, conventional tug ppushback couldn't get traction...went in reverse for a couple of seconds to get out.
again, against rules on 767