Here are the sensors we're using, by popular request.
http://www.roboticsconnection.com/p-67-line-following-sensor.aspx
http://www.robotshop.ca/home/products/robot-parts/sensors/infrared-light-sensors/solarbotics-i2c-it-ir-rangefinder.html

Still need to ask Dr. Cumings if he thinks they will work for what we are doing, but thats what Im bringing in to show him.

EDIT: Updated distance sensor. Both are I2C now, and should be easy to use.