I was waitlisted in December after applying R1. Was invited to remain in the waitlist in March. I have received a call from my waitlist officer since then to ask me typical Qs (why Columbia, why MBA etc), seemed like they just wanted to know if I was still interested.
Hope to hear back :)
For everyone afraid to aim high because of a low undergrad GPA, put yourself out there! You are more than just a number. I am over the moon ecstatic.
Applied 3/4, interviewed 3/26, called by interviewer 4/21, portal updated 4/22
Interview went fine