hi
i recieved a call yesterday evening from IIT Chennai.
They wanted to enquire i was interested in the seat if offered when it becomes vacant.
they were moving in the fashion----first five waitlisted,then 6-10 and so on.
they wanted to assess the situation and make an estimate of how many seats should be released when waitlist is moved.
As for me i did say yes that time but i won't be joining due to personal circumstances

. And i have informed that to admissions office.
They said in that case also everyone for whom Dean gives approval will be sent offer letter and we have to send our acceptance or withdrawl.
The date to withdraw for first list people has passed and all you second list hopefuls will get their letters in a week..All the best