Hi,
I don't like pyunit, so use py.test instead. It was really simple to wire py.test into the Python bundle, but it was also really ugly using the "Text Window."
Based on some feedback from the IRC channel, and the excellent example of PyMate, I cobbled together PyTestMate which allows you to run py.test unit tests directly from within TextMate, and get lovely formated results from those tests.
It's still a work in progress, but it does work quite well, in fact, the unit tests for PyTestMate were all written using PyTestMate.
If you'd be interested in taking a look at it please let me know and I'll forward you the code.