Hey Walter,
the setup, that the grid is supporting inline editing is not as trivial as just reading from a store. Currently the grid integration of dojango just supports simple reading.
But for having write capabilites you would need to add a WriteStore to the grid and define which type of form widget (checkbox, select, ...) you want to use for which column. And of course the save method of the WriteStore must be defined. Maybe you want to save, when the user changed any field or sometimes you want the user to click on the save button before. This behavior needs to be defined.
Maybe using a JsonRestStore in combination with grid could simplify that process and it will make that easier configurable. I already looked at Django-Piston:
http://bitbucket.org/jespern/django-piston/wiki/Home. Maybe this will be used in combination with Dojango.
Hope this helps.
Regards, Tobias