If you think that Xiaomi devices are only supported by ROM MIUI, you are very wrong!
Surely we will not have all the ROMs available, but at least the most used are already available: the CyanogenMod 10.1 and 10.2, the ParanoidAndroid e Android Stock 4.3.
The port of the latter is of @ 秋叶 随风 (already! OWN HIM!) who - despite the codes being released only yesterday - has already ported the 4.4 KitKat to Xiaomi Mi2!
This is what the English forum en.miui.com reports in this thread, with lots of photos. Unfortunately, I am honest, the photos do not seem to be related to Android 4.4 (except for a few), so I only post some, but you can easily see them in the MIUI forum post.
The download is NOT yet available, but we will let you know as soon as it is!
Think, like me, that we will see Android KitKat first on our terminals made in China and on the Nexus? 😀