Wikityo is a free application that runs on smart phones (currently Nokia and iPhones, we are actively working on the Android and Windows Mobile 7 version).
Here is a quick introduction on how to use the mobile application.
Nokia
The application is currently under review and will be available for download shortly from the Nokia OVI store.

iPhone
The application is now available for download on the Apple App Store.

The system is set up with a demo teacher and student account. Once you install the application on your device, you can try it out, by entering the following information in the settings tab:
School : George Washington
Name : Benjamin Franklin
Name : Andrew Jackson
email : ajackson@gmail.com
Zip : 00001
Password: 1234
You'll be able to check Andy's homework and his friend list.