Post from Canon Australia back in February says -
We are developing a solution to enhance the focusing feature for the EOS 5D Mark III and EOS-1DX and plan to release a firmware update based on following estimated schedule:
EOS 5D Mark III: (estimated) Late April, 2013
EOS-1DX: (estimated) Late May, 2013
Personally, I don't hold out much hope of it being on time or the focal point illumination being fixed given past history - it's been 6 months since it was announced!