Ideas for Python project?

[Jon Hewer]

Hi

I'm pretty new to Python, and recently been working my way through
Dive Into Python, and I'm currently writing a really simple rss reader
purely to get familiarised with the language.  I want to move onto
something a little more challenging, but I'm stuck for ideas on what
to do.

I'm after a project that can start quite simple, but has lots of room
for expansion when I get more confident with Python.  Ideally
something which would start as a command line program, and then when I
feel adventurous I could build a GUI for it.

I have just bought the Foundations of Python Network Programming book,
so maybe something network related would be good?

Cheers
Jon