Hi, I just tried to transfer my AA miles to Midwest, and they said I couldn't do it. On Gleff's post when he says:
"AA: credit your miles to Midwest and transfer Midwest --> Amtrak --> United"

Does he mean, when you take a new flight you tell them to put those miles on your Midwest account? So it's only good for future stuff.

Are there any of these other ones that you can transfer existing miles into CO or Amtrak, and thus United?

Feeling like it might have been to good to be true.....