Round corners for Openscad - Library

Making a cube in OpenScad takes just one line of code. Making it nicer (with rounded corners) takes... 40 lines of code!
But hey, the good thing about OpenScad is that once someone makes a library, everything becomes trivial.
So now, making tidy iPhonesque shapes requires just a line of code:
roundCornersCube(10,5,2,1);