Emerge...the solution to non connected registration
I have seen the next generation of Emerge from Group Call and i believe this maybe a solution for your school..
It supports ipod devices and will support andriod powered tablets in the near future.
The software integrates with Sims.net and allows registration without a real time link..it synchronises with Sims once in range ie. wireless network..
Ideal for on field or off campus activities..
We are seriously looking at this as a solution for registers during fire drills.