At this time only StackExchange import is supported.
There are two ways to import your StackExchange dump into Askbot:
via the web at url /import-data/, relative to your forum installation
using a management command:
python manage.py load_stackexchange /path/to/your-se-data.zip
Before importing the data, an entry askbot.importers.stackexchange must be added to the INSTALLED_APPS list in your settings.py file and a command python manage.py syncdb run to initialize the stackexchange tables.
In the case your database is not empty at the beginning of the process - please do back it up.