Well, I learned a lesson today so I thought I would share.
I tried to install ML on my Mk III and finally got it to install from the compact flash card, but when you install the EyeFi card, the camera won't even boot. If the bootflag is enabled and even if ML is uninstalled, the camera won't boot.
Trust me, you cannot run ML on 1.2.3 with an EyeFi card even IN the camera. It appears that the EyeFi card somehow uses the bootflag to boot WiFi and when it's re-directed, it screws the pooch.
Been there. Done that. Got the bloody t-shirt. Save yourselves the heartache. It won't work.

