We tried out Slack for internal communications a million years ago, and it fizzled almost immediately. Asana is our main hub for scheduling info, and everything else is kind of scattered.
We're trying again. I think it would be a lot more fun to use if we have a bigger crowd. Should be a cool place to talk shop, say wildly inappropriate things, tell bawdy engineering jokes, etc.
If you want to join, shoot me an email (firstname.lastname@example.org) and I'll send an invite.