I'm in the same boat! I haven't heard anything from IPCAA, via email or snail mail. However, in my case, I'm not certain if they processed my application. On Wolverine Access, it says that my official transcript has "not yet been received" despite me having sent it in twice. I also attempted to contact the graduate school about the issue to no avail.
Let me know if you hear any updates! I'm still eager to receive some news soon.