The solar cars were built by hand by highschool students from New York, Minnesota, Mississippi, Texas, Colorado, California, Indiana and Mexico. The students will be using Dell notebooks and wireless systems to monitor/manage their solar car's power and monitor the weather. They will also be uploading their positions and stats to compare to other racers which the judges will be using to aid in monitoring the race also.
No word yet if mapquesting shortcuts are allowed.
And for their list of sponsors:
The Winston School
Weather Decisions Teachnologies
For more information:
It would also appear as though Dell has donated hats to all participants, but I'm just guessing here: