Arduino Ethernet Shield

We are doing a Wifi Robot Project, in which we are decided to implement some sensors (temp,pressure etc.). Can we use an Arduino Ethernet Shield for send data from Arduino to the WiFi Router. We have an Arduino(Atmega 168 serial). is it possible to interface our Arduino with Ethernet Shield.

if so please give us some soiftware details to visualize the output....

Start here - There are zillion examples on the forum. Which have you tried allready?