I've been very short on time recently and I wanted to see if I could find someone who was interested in taking over as maintainer of two of my question types: drag-and-drop matching and drag-and-drop ordering. According to Tim's recent survey, they're used by quite a few moodlers and I'm sure your efforts would be very much appreciated by the moodle community. They're both based on the core matching question and are fairly similar underneath the hood, so it would probably make sense for both of them to have the same maintainer(s).
The functionality has stayed very stable over the last four years and I've only had to fix a handful of bugs in that time. Most of the work is in updating them for newer releases of moodle and answering questions from users. If you're interested, send me a message and I can help you get up to speed. The main outstanding task at this point is to update them for 2.1.