Hacking free WiFi at XML 2003

Ben Hammersley's at the XML 2003 conference, where the WiFi password costs $40. He and Bill Kearney and the other RSS-wonks in the room have interpreted the confernece organizers' charging for basic conference functionality as damage and are routing around it:

In answer to the long held question, can a TiBook with one Wifi card act as a repeater and relay access to everyone else in the room without them having to pay, the answer it turns out is yes. How do we do this? Well, first turn off the built-in Apache installation on the OSX machine that is online. Edit httpd.conf to load mod_proxy (there are about 20 or so lines to uncomment). Turn Apache back on. Go to network prefs, and find out your assigned IP address. Write it on a piece of paper, and pass it around the room, telling them to set it as their web proxy.

Link