Questions about Midwest are usually dealt with over in the
Other North/South America Frequent Flyer Programs forum, so I'm going to move this thread there.
FWIW, while I don't know of being able to credit Midwest flights to another program, Midwest Miles can be used to claim awards with American and Air Jamaica, and can be transferred to Amtrak in 5000 mile increments (and from there to Continental or United).
Regards,
Gary
aka gleff
MilesBuzz and Delta moderator