Too bad the contest has ended, but still I would like to share my ideas and would like to see them implemented in the future.
1. A crowdfunding platform where projects are paid with EMC
2. BTC / LTC / other altcoins price ticker in wallet interface
3. An arcade gaming site which hosts gaming tournaments. Entry fee and prizes in EMC. I had tried this for a different altcoin long time ago, but the payment was manual which was one of the reason it didn't attract many.
I'm very glad to know that eventhough this project just ended you still what you jave learned ang give some information about it. Thanks for this.