VentureBeat: 10 things I love about Slack. http://google.com/newsstand/s/CBIwiLS77SA
CALI has been using Slack for about a year and we love it. It has replaced our group mailing list as the primary way we communicate. We use it not just to talk to one another but we have it wired into things like Github and Nagios to help us keep track of things we’re doing and to alert ids to trouble with our systems. Very soon we’re going to invite more folks we talk to regularly to join us on Slack as a way to increase our communication with our members.
All in all I’d recommend Slack for any group as a great way to get folks telling till each other.