Re: The rdbms API is not available because the MySQLdb library could not be loaded.

These steps at least got me to the point where python could import MySQLdb from the command line:

http://decoding.wordpress.com/2012/01/23/how-to-setup-django-and-mysql-python-on-mac-os-x-lion/

GAE still is having trouble and adding the import statement to dev_appserver.py still doesn't work but I'm one step closer than I was a few minutes ago...