I'm certainly guilty of pimping a YC company by submitting this, but their approach to validated segmentation is really interesting. After so many mentions of

I'm certainly guilty of pimping a YC company by submitting this, but their approach to validated segmentation is really interesting. After so many mentions of airline reservation systems by pg (below), I'm wondering if GetGoing is using LISP? http://paulgraham.com/gh.html http://paulgraham.com/gh.html http://www.paulgraham.com/icad.html http://www.paulgraham.com/icad.html http://www.paulgraham.com/carl.html http://www.paulgraham.com/carl.html