Here is an Arduino code that sends some values to a Googledocs spreadsheet.
This is based on a RobertMParker’s code found here : http://asynclabs.com/forums/viewtopic.php?f=16&t=489
It uses an Ethernet shield to connect to the internet instead of a WiShield.

You just have to put the key of your own form into the url.

The code is downloadable on github : EthernetShield_to_google/EthernetShield_to_google.pde