Remember the Gmail Light Cube notifier ? This is another project that displays the status of your email inbox, but this time trough an RGB LED. So you can setup 3 types of email notifications like work email in red, newsletters in green, other in blue. The color and characters are controlled trough RS232 by a Python script that runs as a scheduled task every 10 minutes, and the circuit is powered by a Picaxe 08M. The author didn’t provide a link for source code download, but he writes that he will send the code to anyone who asks.
RGB LED Email Notifier: [Link]