Poster800
The folks from Libelium sent in their Arduino contest, looks interesting –

It is a contest for everyone who believes in Open Hardware and enjoys hacking with Arduino. It is the time to show what you have done and share it with the Community! There are 3 different categories:

Common life hacks. Have you designed a remote-pets-feeder? A gadget for watering your plants? A GPS navigator for your bike? Or anything that makes your life easier?
Art hacks. Artistical installations, interactive objects… just show the limits of your imagination.
Robotics.

The winner of each category will get one GPRS/GPS Module for Arduino. One of the exclusive and limited edition for Arduino whe are going to release.
It will let Arduino to connect to the mobile networks, make and receive phone calls, send and receive sms’s!, give the GPS coordenates… A new level of modules for Arduino.

Arduino contest @ Libelium Comunicaciones Distribuidas – Link.

Related:
Mkardie-2-1-2
Arduino guide @ MAKE – Link.

 Make Pt0134
Making Things Talk by Tom Igoe – the best book on Arduino! – Link.