I wait until someone publishes a hack, so I can produce some dust on another pool...
I doubt it'll be a hack more of a configuration, just plug in via ethernet, connect and possibly install a new firmware image or patch.
Bitmain has never in past done anything to stop custom firmware. I'm assuming they will keep that philosophy with this device aswell.
So it is a good chance it will have a custom image, as long as someone works on it.