Just wanted you to know that there's a new site www.SensorBay.com, where I blog about various sensor projects.
Many of them utilize Arduino, hence they should be of interest to readers of this forum.
I've just finished two beginner level articles:
Introduction to Arduino The article covers motivation, selecting and purchasing the board, setting up the development environment, and creating a very simple sensor project using just a temperature sensor and a buzzer. NO SOLDERING SKILLS NEEDED! http://www.sensorbay.com/2012/11/introduction-to-arduino.html
Home Energy Monitor with Arduino Introductory level project, which utilizes a PC, an Arduino microcontroller board, and a custom made sensor box for monitoring home electricity usage. The idea is to use an optical sensor to read current energy consumption from home electricity meter, and send this information to a PC for post-processing. The article goes through developing the sensor box step-by-step, explaining everything on the way. http://www.sensorbay.com/2012/11/project-1-home-energy-monitor-with.html
Next article will utilize the energy monitor sensor box to discuss about creating software for sensor projects, and how to push sensor data to the cloud.
Hopefully these will be useful to others. I'll be glad to hear any suggestions and feedback!
Full disclaimer: I'm a long time Arduino user who has done lots of Arduino based projects both for hobby and business. As a strong supporter of open-source approach, for a long time I've wished I could give something back to the Arduino community. Finally I decided to reserve some of my time for creating a sensor related blog, and started www.sensorbay.com to share my projects and experience as a professional sensor specialist.