In order to complete this lesson, you will need an Arduino, an Ethernet Shield, and the Pressure Sensor. If you do not have this particular pressure sensor, you can probably follow along in the lesson using whatever sensor you have that is of interest.
There are a lots of Twitter feed readers around the Web that use Arduino AND a PC to display twits on LCD displays or whatsoever. Then, I decide it was the time to design a solution for performing the same job WITHOUT A PC, and here's the project.
Geeknesia is an Internet Of Things platform, kind of like ThingSpeak but it's from Indonesia.
I use Arduino Uno and Ethernet Shield for sending DHT21's data (Humidity and Temperature) from my lab to Geeknesia.