An interesting article "The Smarter Web" by Sarah Perez on ReadWriteWeb...

"In this transitional period from Web 2.0 to Web 3.0, we're starting to see tools and services that aim to expand upon the traditional search experience in order to deliver us to a more intelligent web. On this new web, we're moving beyond SEO and PageRank to determine relevance and instead are seeing new technologies develop that better understand meaning, context, and personal preferences..."
Part 1: http://www.readwriteweb.com/archives/demo_trend_the_smarter_web.php
Part 2: http://www.readwriteweb.com/archives/demo_trend_the_smarter_web_par...