At present, Gradebook only allows for scoring activities hosted by Moodle. How about including activities where the teacher can simply enter an activity and a grade (such as an in-class activity)? After all, not all course activities may be run on Moodle. I find I need to merge Moodle stuff and non-Moodle stuff, and calculate the weights of each category before arriving at final grades. I wish Gradebook could be my real gradebook--be relatively comprehensive; not just one of many intermediate steps.
Note: I'm using Moodle 1.9.3. I installed Moodle on Ubuntu Linux 8.04 and have been delighted ever since.