I am still waiting too...
The Michigan invite means a lot to me since I already got dinged from my reach school, and the other school that I am applying to has self initiated interviews.
An invite from Michigan would give me reassurance that I have a good shot at a top school, and give me some much needed motivation/energy to perfect my round two apps.
Some days I think there is no way I can’t get an interview from Michigan, there is no way I can't get into a top 15 school this year. Other days I think my profile is too over-represented, my stories are too plain, my GMAT is too low, and my work history is too uninteresting.
This waiting period is definitely the toughest part of the application period…give me your decision already.