Three terms that make my right eye twitch:
Web 2.0 isn’t. Someone building a ‘web 2.0’ web site is building a better web site. It’s not some sea change in how web sites work.
A blog is not a revolution in internet technology. Blogging software is just a form of content management.
Viral marketing is just marketing that works. It’s not injected, sprayed into the air or otherwise magical. It’s just a piece of marketing that gets passed around. And it’s not just an internet thing, either.