You know, it seems pretty commonplace for web firms to describe their services as “Web 2.0” but if you were to ask them what that meant you’d get a variety of similar answers along the lines of “websites with greater interactivity.”
While that is part of it, it’s really something a little more specific and most people aren’t really aware of the origins. It’s not a new version of anything technical nor is it a guideline or standard you adhere to.
Remember the dot.com boom and bust? I do! I lost a lot of money while I was in school investing in overnight successes (or failures as it were).