We've finally finished the WeBWorK module (the new more more modular interface to the symbolic math. homework generating software from the U. of Rochester). I'll monitor it for a week or two in our summer classes: https://webwork.math.ohio-state.edu/moodle_su03/course/view.php?id=2 (click on "Login as a Guest" or use doe.123 as username and password) before making it publicly available.
Martin, do you want to add it to the contrib section of the cvs?
Also I gather from looking at http://moodle.org/bugs/ that the new gradebook feature is projected for release in version 1.1 in September. Am I correct? If so, will it have an API for an external program to update grades? Or will I need to continue using the local web robot hack to do the updates?