research on texting in the classroom?

[scamp...@aol.com]

Hi all - Can anyone point me to research that has been done on the disruptive nature of student texting in the classroom?  I am particularly interested in research on college students, but high school may still be relevant.  So far I am just seeing a little bit in the popular press (anything you can send me from popular press will be helpful too), and some older studies that deal with mobiles in the classroom more generally, without a focus on texting.

Thanks!
- Scott Campbell