Spoilers here.

On the website, the producers had an "Outtakes #4" video up for about 3 hours. This video detailed 13 of the 18 and showed video of them making it through. The video's down now, but I made a list:

Kenny Luby
Jessica Brillhart
Will Bigham
Marty Martin
Shira-Lee Shalit
Mateen Kemet
Shalini Kantayya
David May
Claudia La Bianca
Zach Lipovsky
Phil Hawkins
Jason Epperson
Adam Stein

In addition, I think Sam Friedlander did NOT make it, but I didn't make a list of those who didn't.

All I have so far.