Files used in my talk about Selenium and the Page Object Pattern @ ADD13 and other events Recording => https://www.youtube.com/watch?v=hSk-OZHW7ys
See the slides online @ http://rac2030.github.io/Page-Object-Pattern-Talk
For a bit more complex but still very basic example, take a look at my codelab from 2012 @ http://goo.gl/uE52d