This is a tutorial going through the process of setting up the Arduino to send sensor information to Pachube via Processing.
Part One looks at the Standard Firmata. Part Two looks at ways of more flexibility in Arduino and Processing.
Part One: vimeo.com/28552079
Setting up Processing without Pachuino (links used in video):
NOTE: Pachuino updates too fast for free accounts, and will result in a "Rate Limit" warning email. I've modified the Pachuino library to decrease the post rate to the maximum allowed for free accounts, and added .setPostRate(int) and .setRemoteRefreshRate(int) to change them. Eg:
p = new Pachuino(this, Arduino.list(), 57600);
The fork is available from GitHub: github.com/neonascent/Pachuino-fork/zipball/master