A lot of technologies have grown around the workplace, trying to ease the burden of collaboration, from cloud storage, to task management, to document management, and even video conferencing. Despite these advancements, however, a lot of the core communication that happens between members of a workplace still take place inside e-mails or instant messaging. That's not even considering yet the separate and disparate workflows that these tools impose. What if you could have just one virtual workplace to rule them all? That is partially the promise that Slack is trying to make as it undergoes yet another funding round.