I definitely would not give up hope on Michigan if you don't hear today. My notification was through the mail, which obviously spans a longer period of time. Someone else posted that they were notified by email, so I'm not sure how all of it is being handled. In a typical year the Department says they admit 45-50 students for a cohort of 18-20. Even if they are suffering from the bad economy I'm sure they still have many more acceptances to send out seeing as only two people have posted their results here.
Good luck!