Hey, Khertan quietly added a section to the py2deb wiki article about how to add your pre / post install scripts to the build_myapp.py program. I'm not entirely clear on how this works (enclose the entire script in triple quotes? That's all?) but that is good news. I can probably use that script to package my Easy Debian stuff now... And with Fremantle coming, that's something I want to do.
p.postinst = "control/postinst"