I had not realized that all of the iPad, iPod Touch, Netbooks etc. could be synchronized and that the classroom teacher could manage information and download to each device. I learned about the SBISD respository for Apps and the ease of finding just about any app for any subject area. Setting up an iTunes account is also part of this process.
In the beginning, students need to be taught clear guidelines for use and care of all the tools. If this is continually modeled, I do not think it would pose a problem. As for managing the devices I think it will be of utmost importance to have a sign out system in place for their use in the classroom away from stations, and that they should be interchangeable among the collaborative groups. I think it would be important to have a student helper "Tech Captain" to help keep track of the devices each day, to report on any problems and to put them back into cabinets to store at the end of the day.