I've been trying to help out at Magic Lantern too. I've been working with the 5D2. Here is my test: https://vimeo.com/65192979
Your article helped me understand the whole process a bit better. I didn't know how to change the resolution settings (changing to jpg and 720p). I'll try making all those adjustments next. I thought I'd made a great discovery when I found that it worked with focus assist turned on!
As testers, what should our next step be? I want to get this feature up and stable fast!