Unfortunately there is no info about this. Nor from the leaders of this project, nor the manufacturer itself.
After the release there were problems opening the boot loader to install custom roms. Xiaomi then decided to allow unlock for registered developers, so the installation of custom roms is possible since a few weeks. The software for getting root access and bootloder unlock is available.
Rumors say, that Xiaomi.eu is going to provide a rom for us. More detailed feedback from the team would be great.
People also wait Xiaomi to release a global rom in addition to the india launch of the device yesterday.