If you want what I can think of as the easiest way to understand what web 2.0 is would be to use your web browser is 'full screen' mode and see how long you last before you need to use the 'back' 'forward' and other buttons on the browsers toolbar. If you find that you can pretty much point and click on the content within the website itself, and browsing to other sites can be done without the use of the browsers tools then that is what I would consider what web 2.0 is and how you too can experience it.
It is interesting to see, over time, how much more I can go surfing in Full Screen mode these days, especially nice if you use a big screen display and a wireless mouse/pointer for research.
