Examples... Well, there are tons of examples on how to edit articles in Joomla. I would start with the quickstart guide provided by Joomla, http://help.joomla.org/ghop/feb2008/tas ... kstart.pdf
Specifically, I would read the section titled "Sections, Categories, and Articles" on page 10 of the PDF.
For examples of rotating cell phones most major cell phone service suppliers use them. You can see one here, http://www.t-mobile.com/shop/phones/Cel ... -with-Aqua
by clicking on the line "View Demo" below the phone image.
~ Best regards