We were sitting in my living room, coding as usual when suddenly our notifications channel exploded. People were signing up for ToDoBot every few minutes and, what's strange, almost all of them were from Japan. Quick googling revealed the root cause - someone posted about us on https://dev.classmethod.jp/etc/todobot/
We don't understand Japanese, but I guess it's some sort of HN or PH but in Japan. Anyway, in two days we got almost 100 website visits and almost 100 signups - not bad at all! 1000 more and we'll start learning Japanese ;)