Here are my first steps with a personal package for PiScript in image :
The only thing that I really miss is the transparency, because PostScript does not handle it.
A lot of stuff was taken from my old GeoPyX package. I must say that working with PiScript is rather easy, a lot more than with PyX, but PiScript is rather limited for the moment compared to it.
The things I like is that you can build your own objects, then manipulate them as you like, so you can make your own lib, i.e. an electronic schemas lib seems quite easy to implement.
This is a common thing in PostScript and SVG, but surprisingly not in Tikz-PGF.
There's something that will not be easy to build : managing intersection(s) between shapes. I don't know any existing Python package for such tasks.
Moreover, I've got a lot of things to do :