I'm an active moderator in Russian StackOverflow (ru.stackoverflow.com) community. Nevertheless, me and my team came up with this idea very late: almost at Sunday midnight. But it was still worth trying.
What it does
Now it just finds first accepted answer on most relevant StackOverflow question.
Challenges we ran into
We ran into inconsistencies in bot API (guides vs docs vs emulator vs production service).
What we learned
Making web servers on Python, creating Skype bots.
What's next for BotOverflow
Natural language processing, fuzzy search, dealing with low quality search results, notifications.