Sometime in December, Answers OnStartups (http://answers.onstartups.com/) vanished due to not having enough activity during its Stack Exchange beta period (http://area51.stackexchange.com/proposals/6243/startup-business).
With the help of Stackdump (https://bitbucket.org/samuel.lai/stackdump/), I've hacked out a useable mirror from the provided XML data dump.
ShowHN: Answers OnStartups mirror
answers-onstartups.tlvince.com