This Alarm Clock Arduino hack , featured on hackaday,  has to be one of the most innovative uses of an Arduino and Python I have seen! The maker, insingertech, has published full instructions on his hack here.

He goes into great detail on his build process and the diagrams (for the Relay Driver part of his circuit, especially) really help to explain things.

The only critisism I can think of here is that perhaps he should have used an Ethernet Shield for the network connectivity element of his project instead of a PC/Laptop.

Related posts:

  1. Simple LAN Controlled Stereo Audio Switch
  2. Arduino-based Talking & Remote Thermometer
  3. Fun with PyRSSI, an Arduino and Twitter
  4. Webthermo: Web-based Temperature Monitor
  5. Handy link: Arduino Ethernet Bumper Pack