I wonder if they used techniques from http://www.wired.com/medtech/health/magazine/16-05/ff_woznia... I am interested in using ideas from that article and incorporating them into a blackjack site I'm building.
I'm very interested in this idea of taking things that you messed up on before and presenting it back to the end user at a lower frequency.
Wozniak and similar programs have definitely been a big inspiration. One of the important things we wanted to do was bring these into a relatively easy web interface that abstracts away some of the stuff that's going on underneath.