I've been doing some reasearch on the internet for the book I'm writing. I get frustrated when simple concepts aren't explained in language everyone can understand. Take "web 2.0" for example - google it and you'll get a kazillion hits. As for Wikepedia, here's the first line of their huge entry on the subject:
" Web 2.0 is a term describing the trend in the use of World Wide Web technology and web design that aims to enhance creativity, information sharing, and, most notably, collaboration among users. These concepts have led to the development and evolution of web-based communities and hosted services, such as social-networking sites, wikis, blogs, and folksonomies. "
OK - here's my simple explanation (for simple minds like me!).
Web 1.0 - ONE WAY communication. Usually, a static web page that allows you to read content on a web page. Minimal to zero capability to respond.
Web 2.0 - TWO WAY (or more) interaction. The ability to communicate back to other users and systems by searching, sharing, creating, collaborating, messaging, networking, blogging, poking, voting, 'digg'ing, etc. All about interacting with the people, messages and ideas presented.
Voila...and easy to remember too! You heard it here first....