Mark Moraes has been using Python since 2000, it has replaced Tcl as my favorite scripting language and even edges out C as my favorite programming language. So I'm presently trying to convert everyone I know to programming in Python. I need to put some of my Python code up on my web site or here.
Python things I've hacked on include
The Python Cryptography Toolkit, to which I contributed the Windows random number interface, a hashcash implementation and several enhancements to the Unix random number generator.
Pears, a simple and clean 3-pane RSS aggregator, written in Python with wxPython, to which I contributed much Unicode-related stuff so it works with feeds in many languages, and a high-performance high-volume storage subsystem.