To me, Web 2.0 is about tagging

[iamom]

What makes this so-called Web 2.0 (i.e. the widespread use of collaborative, web-based tools and applications (usually available cross-platform via any web browser) to organize the world's information and to perform the world's technical computing tasks) powerful, in my opinion, is tagging. When people using the internet (and conducting research and posting their thoughts, opinions, and analysis on the world around or within them) start to use a standardized content tagging system such that web searches 'by tag' (LiveJournal, Blogger, Technorati, Delicious, Magnolia, whatever) or using tag clouds (LOVE tag clouds, love 'em) renders the most valuable and most pertinent results. More valuable and more pertinent because the regular people using the services become the content indexers, as opposed to the old days, when only HTML developers would include really good metatags and content in the HTML page headers of a given article.

Builds a better keyword index, if nothing else. And I love the cross-platform nature of it, too. Here I am, on my beautiful Mac notebook, no worse off (indeed, much better off) than I was six months ago with my PC.

Okay, now I'm really rambling.