Last year a group of us started a virtual study group to learn how to make custom modules. We had a handful of people join the group. It was fun and I, personally, learned a lot. I'm still not an expert, but I know more than I did then.
I'm getting another group going and wanted to share the information. I learned a lot from that first go around and have changed some of dynamics to make it more focused and streamlined. You can read about it here: http://groups.drupal.org/virtual-drupal-co-learning-group. I'm waiting to hear back from the rulers of the groups realm to decide whether or not we will be a sanctioned group. But in the meantime, I've set the first meetup for next Monday.
As this is a new group we are thinking about doing custom modules again as the first go round, but of course, we are open to suggestions. The decision will be ultimately made by the group in the direction of the greatest interest.
Please join us if you have any interest in participating, or in being a "resident expert" we can tap for great stores of knowledge!