After a couple of refactors, several rounds of user feedback, and lots of front end refinements we are only a few days away from removing our alpha access code and getting some beta users in. Then out of the blue, someone started pummeling our donation widget, trying to make $10 donations with prepaid debit cards. Stripe blocked them all, thankfully, and we took the widget offline as well. The timing was actually great because its serves as a warning shot to be vigilant as we open it up.
Another small milestone was we developed a roadmap that is equal parts marketing and development which build on one another. I've read lots of stories about founders that neglected marketing efforts and hope to learn from those lessons.