The City of Los Angeles has a big problem with illegal trash dumping and an even bigger problem equally distributing a its pickup. Many poorer council districts (mine included) receive much worse responses to requests for trash pickup. #trashtag was a product design that sought to give Angelenos a way to easily report illegal dumping through either a smartphone application or a series of SMS messages. I believe that more city services should be handled through text messaging, since it relaxes assumptions about users' data plans and devices.
I had a great time mocking up the cardboard screens and devices and think that it presents much better in this way, since it highlights the UX instead of getting bogged down in UI discussions.