I need an IronPython\Python example that would show C#/VB.NET developers how awesome this language really is.  
I'm looking for an easy to understand code snippet or application I can use to demo Python's capabilities.
Any thoughts?
I have to agree Geo. Show a C# or VB app next to the same app written in IronPython. When I've done my IronPython talks, I've had a lot of success morphing C# code into Python. It makes for a very dramatic presentation.
I'm also a big fan of showing off how duck typing makes your code more testable.
How to impress developers with IronPython/Python