I've written a bit about a project I've been working on for a while: peer-observer: A tool and infrastructure for monitoring the Bitcoin P2P network for attacks and anomalies https://b10c.me/projects/024-peer-observer/

I have too many other projects currently, but I think this could be a fun side-project for someone: Can we spot public spy-Electrum servers run by Chainanalysis? https://github.com/0xB10C/project-ideas/issues/11