Oh . . . that 1st place was in 2006 . . . in 2007 I attempted to do it with a single photoresistor and didn't realize I plugged it into the wrong ADC port till a week later (yea, I'm a moron haha)
I'll be doing it again this coming April, I got my bot half built for it already . . . I'm going all out this time, with a state of the art line follower