My devcamp idea is to implement the ActivityPub protocol in Moodle, so that Moodle instances can federate with each other and other apps on the fediverse.
Applications for this could be to allow other fediverse users to follow a Moodle account, which could publish achievements like course completions, badges that have been awarded, etc. and receive likes/comments from followers. For institutions with more than one Moodle instance, it could enable inter-Moodle messaging between different instances.