Not sure if anyone has checked out slack.com yet. Basically its a collaboration medium for large and small companies, as well as just about anyone else (its free for groups to sign up/setup).

I'm just goofing around with it, but they appear to have a very neat looking API that could easily integrate into XenForo for things like chatboxes, shoutboxes, even new alerts on new posts.

You might wanna check it out, would be likely a good selling script for larger companies to integrate forums into it, as well as other things, and links easily to cellphones, and computers.

More info: www.slack.com
Use it for a short time between myself and a few members, it's great and easy to use. Haven't looked at the API as I have absolutely no idea how any of that works to integrate it into Xenforo.