Well-polished product.. can you u talk a little bit about the design and the front end. what did you use for the UI design and front end. it is clean..
We have a custom frontend framework that supports realtime data synchronization. We use some pieces of other frameworks, like Backbone's routing and events library. Andrew Ofstad (@aofstad) is our design lead, and created the aesthetic framework (he previously lead the Maps redesign at Google).