I'm a big fan of visualizations. For this year's SXSW, Pepsi came back with an updated version of their "Zeitgeist," created by Amy Hoy and Thomas Fuchs of Slash7. I liked this year's version much better because it included Foursquare check-ins (which everyone was doing) and it seemed to be more relevant for people that were actually there.
I wish there was a Zeitgeist for every event that ever was so hopefully there is a trend toward more visualizations. Regarless of how you feel about the Zeitgeist's actual value, it looks cool and it makes a non-tech company look very high-tech. Well done Pepsi. Well done.
Below are a couple of videos of the displays they had at the Austin Convention Center. Note the Samsung HDTVs :)