It might not be ideal for what you guys are doing, but think about a site with many users buying many different things. It's easy to sneak some changes in there to see how people respond to differential pricing.
From your squeezedbooks summary: "Many web sites, especially airlines, and even amazon.com, change prices for each individual on the site based on their behavoir." Huh, I didn't know that. The plot thickens ... I'm going to be really careful with my mouse movements next time I book a flight. :-)
Yes, it's really annoying to be shopping for an airline ticket, make a significant amount of requests (10-20) with different parameters (dates, airports, etc) only to see your first quote rise when enter it again :-/.
