Yes, but it is still in Alpha stage and one has to re-run the firmware update after every time the camera is powered off. Also, I recently installed the Alpha firmware for EOS-M and whenever I try to shoot RAW footage using the Magic Lantern intervalamoter function, I get several corrupted RAW files ... but it works fine with JPG
Please be sure to report this bug to the ml forum, right? https://bitbucket.org/hudson/magic-lantern/issues/new
I understand you don't want to use ml on 5d3 right now, let alone in a production camera (though you can deactivate ml anytime by pressing SET when starting the camera)... I just couldn't live with the broken auto-iso with flash, so I use it on my 6D no matter the early stage.