Zeta: http://www.4shared.com/file/8eVrrmR8/Whisper.html

I wrote the program around April I guess. Download the file and send it to two phones , run the application. The application uses bluetooth for two chatting. Bluetooth has a range of about 10metres, so the app is useful in a boring class if you don't want to waste your credit on sms. See if it does what you want. If so, you can request for the source code, to assist your learning, and I would gladly post it here.

i'm developing a similar thing and i will appreciate it if you could send the source codes to me to help me out. Thanks