Ah, btw, you don't have to be facing the direction to launch them that way. If you're falling right but your enemy is on the left side, you can get the same effect anyway ^^; Though, trying to imagine a backwards d-air, I think it would be funny to maybe D-air under FD and use homing stall to get back up. Not sure if that's really possible or not.
Oh yeah, Sometimes, as a mind-game edgeguard, I plant a spring by the edge and spam D-air on it. Unawares sometimes go for the spring and end up getting launched by the kick-spam. People trying to go over me get hit, leaving the edge as one of the "safer" options. I might work with that a little more and see what else can be done with it.