I've been in contact with our eInstruction consultant asking whether his company would be addressing the high cost of clickers, considering the free applications becoming available including the possible use of cell phones instead of clickers. He said that an option available for the University for piloting beginning in January 2010 is pay-as-you-go for students. Students would be able to purchase clickers at the bookstore for $24, and then pay a registration fee of $13/semester (that's per semester and NOT per class) for the first 3 semesters.