This reminds me of the Hackontest (http://hackontest.org) (Disclaimer: I was working there for/on OpenLieroX.)

We were filmed all the 24h via webcam and all our screens were recorded also via VNC and inside the OpenExpo, one could watch us coding live.

I don't really find much records of it though but here are two videos (sadly not the VNC records):

http://www.etoy.com/blog/archive/2008/09/26/hackontest.html

http://technocrat.net/video/Hackontest/2.mpg

I find it very instructive to actually watch other people coding.