Hello, SDN!
I got an interview invite this morning after receiving the "final review" email last week Monday.
Available dates were 3/12 (few slots in the afternoon), 3/23 (fully booked but there's a waitlist), and 3/31 (most of the spots were open). I chose to interview this Thursday for fear of diminishing spots. Judging from this thread it seems like they make decisions within two weeks, so people interviewing this week will be taking spots away from those interviewing at the end of the month. I couldn't see dates for April or May so I'm not sure if that's by design and you can't book that far in advance or if the cycle is finally coming to a close. Make what you will about that.
Best of luck to everyone else interviewing or still waiting to hear back. TUNCOM is a great school and I hope I get to continue what has been a very long personal journey with them.