We've been using Slack for almost a year now. 40 people on it and it's not taking over for email, but giving us an overview we haven't had before:

• All JIRA tickets and source code commits are posted to a channel.
• All servers from different environments (test, staging and live), post into a channel when they are updating (start and finish).
• Critical errors has a separate channel, with links to uploads and stack traces for the error.
• All customer tickets that come in are posted to a separate channel.
• Triggers on our services (contact us, feature tests) are posted into a channel

This means that all people have access to the latest information from most of our systems in a single app.

Now anyone can check wether a server was updated, bug is closed, or how many errors we've had - wether they are developers, designers, testers or CMO.

In addition, Slack beats all other IM's for a very important thing - file uploads/attachements - this is an utter dream when compared to Skype or sending files through other services.

I admire Hakim El Hattab http://lab.hakim.se/

Hereunder: menu: http://lab.hakim.se/meny/ modal: http://lab.hakim.se/avgrund/ present: http://lab.hakim.se/reveal-js/#/ zoom: http://lab.hakim.se/monocle/

A discontinued magazine, but I think it belongs here: Emigre