Here’s the original announcement on the HOPE Wiki:

NYC Taxi Presentation announcement

Here’s the PDF of the presentation and the audio:

NYC Taxi Presentation

NYC Taxi Presentation: HOPE Audio

NYC Taxi Presentation: HOPE Video

Purchase DVD of video from 2600 website

Here’s the main source, “Taxi 07: Roads Forward”

Download PDF eBook

Articles mentioning the presentation:

• Penn State: IST Student Examines New York City Taxi System
• C|net: HOPE Conference highlights everyday hacking
• C|net: 2600 HOPE conference bringing hacking to New York City
• The Last HOPE, Part 4 of4