Our project has changed to be a shared bloackboard application. the application will feature a "Client" and "Server" role for the same application on each individual device. This will allow seperate colors to be drawn on the same field at the same time and it will differentiate the users. We will use bluetooth to handle the communication between handhelds.
Here is a beta screenshot of the interface. With most of the draw and scroll code complete we are now focusing on the bluetooth communication.