Back in September, Ronald Heft, Jr. put an informative review of Assignment Planner up on his blog. If you’ve tried using my OmniOutliner approach or some other system and aren’t yet satisfied, Assignment Planner may be for you. I haven’t had a chance to try Assignment Planner, but judging by Ronald’s review, a lot of time and effort went into making this application. Based on a quick view of the support forum on his site, it appears to be well-supported by Logan Rockmore, the UC Davis undergrad who created the app. For maximum functionality, registration ($5) is required.