Coding the Arduino was pretty simple. Here is the code. Just upload to the Arduino, make all connections, and you are ready to go. Here is my completed scale. The packaging stinks, but I wanted to get it up and running. I'll work on a better package. If you come up with something, let me know.
After powering up the system, the value of the variable "fullKeg" is stored and every weight is then continuously subtracted giving you the values of tare, glass weight, beer weight, and the weight of beer left along with the percenatge of the keg on your serial monitor. I'm working on the VB.Net code. To reset the system after a new keg has been installed either power the system down or press the reset button.