This is amazing — what a great use case: bringing together Slack's slash commands and "Add to Slack" button with use of Uber's API. And, it's open source! The product a weekend hackathon.
Awesome list of commands to type into Slack:
/uber ride [origin] to [destination] -- Request a ride from [origin] to [destination].
/uber estimate [origin] to [destination] -- Get price and time estimates to drive from [origin] to [destination].
/uber status -- See the status of the last ride you requested on Slack.
/uber share -- Get a link to share your ride's progress.
/uber cancel -- Cancel the last ride you requested on Slack.
/uber help -- Get a list of available commands.
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