like we have mentioned here
https://news.ycombinator.com/item?id=10360682
we have curated the AMA at
http://www.askmeanything.me/brands/ycombinator
The Q&A for this thread itself can be found in a separate tab on the page labeled as "Winter 2015 Application" on the link http://www.askmeanything.me/brands/ycombinator