Well, there goes another chapter. Chapter 6 is all about data.

"Dynamic data is an important part of any Palm webOS application to keep the user connected and in touch, while local data is critical for offline access and a responsive user experience. In this chapter, we've covered both topics, showing you how to use the Depot and Cookie objects, along with Prototype's Ajax functions and the HTML 5 Database APIs to provide what you need. Managing your data in an efficient way is as fundamental to a great user experience as the powerful UI functions."

One thing worth noting from this chapter are Mojo Cookies. Since HTML, CSS and Javascript are the three major component of webOS, most applications running on the webOS platform are like webpages(Before Flash hits). What sets webOS apps apart from traditional webpages are Mojo Cookies. They store data in local storage to save things like preference settings and current application state. 

Hope we'll get something new/interesting about the webOS from the next chapter of the book.