There are many ways of putting real world data to webserver. You can use third party services like cosm. But if you do like to keep everything under your control then do it simple way. Luca chares a tutorial how to do this using simple PUT and GET methods. For this he uses PHP pages to read data from Arduino with Ethernet shield and then display on webpage in your desired form.
His example is based on reading SD18B20 temperature sensor. Data is stored in CSV file, but it is recommended to use database instead. But for demonstration purposes it is enough.
