This is a not exactly a technical question - sorry in advance .
I have a social web app on Facebook and I want to give my app's users the ability to chat between themselves (exactly the way facebook chat looks). As I see it here are my options :
1 : Regarding the Facebook Chat API http://developers.facebook.com/docs/chat/ it is not clear to me whether this works only for a user's Facebook friends or will I have the ability to let non friends chat too (it is very important since 99% of my users aren't supposed to be Facebook friends). I read it a few times and it seems that this service is only for a Facebook user and his Facebook friends , but maybe I am wrong ?
2 : If I am right and Facebook Chat API is only for friends , what is an easy and safe way to implement a simple chat between 2 users myself? (I am not expecting millions of users on my app so it's not out of the question for my app to implement a chat).
Per Send message to a non-friend facebook user?, you cannot send chat messages via the API between Facebook users that are not connected.