Hi Duolingo, I was just wondering, has your Hackathon started/been? Just I've now seen two changes that were asked for: the join date visible in profile edit and a way to stop you leaving lessons. Whatever the answer is, thank you for being the best language site ever!!
It hasn't happened yet, but will very soon. :) Hopefully we'll be able to share some of the things that get done.
If it is, I hope they post a notification with a list of all the visible changes when they're done.