As an edit to the above, as pointed out in other comments, this actually only does unidirectional notifications - i.e. pushing notifications to Slack. This is t

As an edit to the above, as pointed out in other comments, this actually only does unidirectional notifications - i.e. pushing notifications to Slack. This is the part that is already really trivial, with Slack webhooks. I suppose this hooks into stuff like SNS and may not require writing code or running a server/lambda, but still, less useful than it first appeared. A service for easily setting up backends for conversational slackbots or slash commands would be much more exciting, in my opinion.