Unfortunately, the organizers of WordCamp Detroit have had to cancel the event they were planning for 2013. A post describing the reasons behind the decision are detailed on their site. All tickets and sponsorships have been refunded. If you’re in the Detroit area and would like to help organize a WordCamp next year, you should join the fantastic local meetup - it’s a great way to share knowledge about WordPress all year round.
We look forward to what the Detroit community comes up with for 2014!