Could we host an exchange on a cloud account at IBM Bluemix? We could modify the smart contracts of Hyperledger Marbles to create a cryptocurrency exchange and host it in the IBM Cloud. In that way we could also get help from the Hyperledger developers. Hyperledger uses Node RED, which is a really cool way to construct smart applications for the cloud. It makes it easy to add sensors, IoT and API's to your program.
I am not really big on the idea of setting up an exchange for commercial reasons, however for some amusement I was thinking we could develop something like the below art auction demo and have community members bid on blocks of DTC. It would surely make for an interesting screencast and one that we can upload to our new Datacoin youtube channel.
Anyways I'll find the art auction repo for v1.0 and have a look into it.
https://www.youtube.com/watch?v=pvucn0jPo2k