iPhones used as clickers

The Chronicle reports on its Wired Campus blog that Abilene Christian University has developed an application to turn iPhones and iPod Touch into clickers (they also hand one to each new student!). In addition to the advantages of using clickers during classroom for such things as true or false questions, the application lets students answer open-ended questions which appear in a cloud formation on the screen. But the main advantage seems to be that students don't forget to bring the phones to class since they depend on them for so many other things.