What would you think of a Discord server for STEP? For those who don't know - Discord is an application for text and voice communication. Kind of like a fusion of IRC and Team Speak. Or an alternative for Skype, but specifically for gamers.
It can be run in a browser or as a desktop app.
Servers can have multiple text channels (rooms) and voice channels.
It's very easy in use and you can customise it to your liking as an admin, including creating group-based access to various channels etc.
Not sure how useful it would be, but I guess it would be a good thing for a quick chat and quick help on-the-go.