You deserve much thanks for developing such a nice package.
> An afterthought: perhaps an EPS backend instead of/additional
> to a PS backend would be more convenient for inclusion into
> publications. I know very little about postscript programming
> so I don't know what's the effort involved, though.
Not much at all. As far as I know, the only difference between eps
and ps is a bounding box at the top of the document which gives the
figure dimensions. It shouldn't be hard to check for an extension in
the savefig command and add the bounding box if eps is requested.
I use postscript (*.ps) directly in my LaTeX documents without
trouble, however. Are you using LaTeX?