In early July, Mozilla team released a new project similar to ShowSlow in it’s concept, it’s called Cesium – their goal is to help people monitor what’s going on with their performance.
Ryan Doherty who’s running the project and I agreed to join forces to the degree possible and started to work with YSlow on improving the beacon support there, we also followed up on a bug I filed with Google Page Speed project to implement the beacon and it looks like first version is coming up in v1.2 of Page Speed.
Ryan also created a page on Cesium wiki to document beacons and we’re working together on it to make sure we reflect the state of beacons there.