Python
Favorite Python resources:
python.org
diveintopython.org
stackoverflow.com
showmedo.com
video.google.com
There is a great video podcast on iTunes called Python Osmosis.
My preferred Python dev environment is Eclipse. Make sure to download the PyDev plug-in. You can use Subclipse for source code control.
If I have to recommend a single book, it would be "Core Python Programming" by Wesley Chun. An excellent reference is "Python Essential Reference".