I just discovered this new Moodle project which seems very promising! At least I hope it will improve the current status of sharing resources in current moodle.net and improve colaboration among teachers around the world.
Just some random ideas:
Sharing quizzes, for example, could be done much better than using the database module. Some tagging for level, topic, language, or grouping to be associated with other questions. Voting for questions or searching for most downloaded, liked questions, etc... Then you could add rating for teachers that have more questions downloaded or liked.
Also searching for teachers that has more popular resources, with some filters too. Then the social aspect of following teachers, and being notified when they upload new content. As a decentralized tool maybe moodle.net could link to the resource in their Moodle instance, for example, and pull updates.
I think then you could comment on resources, and maybe improve them (or fork them like github).
Good luck with the project and I hope to see some real changes in the web soon!
PD: as a side note, there is a bug that currently limits the size of imported questions in Moodle, someone solved it but still has not been integrated. If we are going to share quizzes this would be a problem.