If there isn't one, can we maybe create one?
It would depend on how many users it gets.
A Forum/Whatsapp-group/Telegram-group/Google+ community is as good as its number of followers (and contributors).
I don't think Whatsapp is the right medium for this. Say it has a few followers, you don't get an answer... say it has thousands of followers, you get flooded by messages. And with Whatsapp all messages are in one timeline. Not really clear for asking questions.
You do know there is a
Google+ community? Although not as much help as the forum here, it does have it share of followers and the topics are separated by post.
O, and for just chat... there is a
IRC Channel right here (also see the left bar for the link)