[Baypiggies] Windows/OS X installers for PyQt4 apps

[Mark Voorhies]

I am starting work on a Python/Qt4 based GUI and am looking for advice on 
packaging the finished application for Windows XP and OS X.

The details are:
  * The development is being done on Linux (Ubuntu and Debian), so open source
    packaging tools that run on Linux are preferred.
  * I am using the GPL licensing option for Qt4 (entire application 
    distributed under the GPL).
  * The current dependencies are Qt4 and some pure Python libraries.
  * The target audience is non-programmer biologists, so the install process
    should be on the order of "download this file and double-click to 
    install".

My initial googling turned up these threads:
  http://mail.python.org/pipermail/baypiggies/2006-December/001398.html
  http://mail.python.org/pipermail/baypiggies/2008-April/003296.html

which are useful, but not as Qt-specific as I was hoping to find.

Thanks,

Mark Voorhies