I just made many corrections. I could find only 2 published books. please send me a personal email if you have other corrections and they will be incorporated.
It also might be worth pointing out the community size based on the frameworks. By looking at their respective IRC channels and/or Google Group sizes you can get a rough estimate how big each of their communities are. Overall, I've found any / all python web framework communities to be extremely helpful and friendly. I say that not to take away from the non-python frameworks because I don't have experience with them.
I couldn't easily find your email so here is a list instead. These books are out right now:
The Definitive Guide to Django: Web Development Done Right: http://www.amazon.com/Definitive-Guide-Django-Development-Ri...
Sams Teach Yourself Django in 24 Hours: http://www.amazon.com/Sams-Teach-Yourself-Django-Hours/dp/06...
Professional Python Frameworks: Web 2.0 Programming with Django and Turbogears: http://www.amazon.com/Professional-Python-Frameworks-Program...
Here are two coming out later in the year:
Practical Django Projects (June or July 2008): http://www.amazon.com/Practical-Django-Projects-Pratical/dp/...
Python Web Development with Django (Sep 2008): http://www.amazon.com/Python-Development-Django-Developers-L...
- Django's caching supports ram, disk, database, and memcache as well. - Migrations are supported in Django via the 3rd party django_evolution to name one of a few. - Django trunk also has simplejson included. - For documentation there are the online docs, the djangobook.com website, three published books as of today, and at least a few other books coming out in the next few months. My point just being that there is more then just one book.