It's not often that such a great plugin is published. Thanks evanolds.
It does look a little jaggie when you reshape images though. Perhaps some anti alaising would help. Also some fine tuning for the nodes would make a very helpful addition to the interface.
Edit: Also I think some of the extra control points don't warp the image properly when you use 8 control points.
The top middle and bottom middle ones do this to the image where as the left middle and right middle ones work perfectly.