Messaging, Global Leader Board, Mark as "spam" and Notifications!!
Hey, I'd been thinking..
What do you guys think about adding messaging to Duolingo? Maybe I want to say something to a specific user and there's no way I can reach to them.
And, what about marking a user as Spammer, or just unpleasant, you could receive that info and check those users out, to keep the community clean.
And Leader Board? I mean, global leader board, that could add a nice extra gamification, I love translating and I would like to see how I'm doing on a global scale, it would definitely encourage me to translate more!!
EDIT: Notifications could be really useful, it's not very comfortable to follow the discussions I'm in via mail, it gets annoying sometimes!