Have participated and demoed my app at Firefox OS App Day, in bangalore. My app was selected as one of the winner. Would be receiving Firefox OS developer preview phone as prize.
My app is about custom home screen, specifically tailored for Indian audience with Indic language support and Indic language keypad. There were more than 100 developers participated in the event and were around 15 hack demos. Was happy that many developers and mozilla team got excited about my app.