@Jalien, gradebook should be ready in a week or so. The idea is to use BuddyPress forums as a platform for students solutions postings, and implement a grading system above it. All the data later will be pulled into main Courseware dashboard.
A testing version is available now, but it has no gradebook so far, and will require UI/UX work. A final version is scheduled at the end of my gsoc period, which is end of this summer.
Basically the API approach I’m using is the same as in WordPress: Actions and Filters. The component will be full of hooks so extending it should be a snap.
Here’s the initial list of features: http://gsoc2010.wordpress.com/stas-suscov-academic-suite/