I've got several eggs I maintain on Pypi but up until now I've always focused on Python 2.5x.
I'd like to release my eggs under both Python 2.5 & Python 2.6 in an automated fashion i.e.

running tests 
generating doc
preparing eggs
uploading to Pypi

How do you guys achieve this?
A related question: how do I tag an egg to be "version independent" ? works under all version of Python?
You don't need to release eggs for anything else than Windows, and then only if your package uses C extensions so that they have compiled parts. Otherwise you simply release one source distribution. That will be enough for all Python versions on all platforms.
Running the tests for different versions automated is tricky if you don't have a buildbot. But once you have run the tests with both 2.5 and 2.6 releasing is just a question of running python setup.py sdist register upload and it doesn't matter what Python version you use to run that.
Python Pypi: what is your process for releasing packages for different Python versions? (Linux)