A really interesting article on the evolving world of search and so called searcg 2 technologies often described as next steps for google and yahoo !!
Its so called third genration search techonlogies Richard MC Manus definition is really neat ;
- First-generation search ranked sites based on page content - examples are early
yahoo.com and Alta Vista.
- Second-generation relies on link analysis for ranking - so they take the structure of
the Web into account. Examples are Google and Overture.
- Third-generation search technologies are designed to combine the scalability of
existing internet search engines with new and improved relevancy models; they bring into
the equation user preferences, collaboration, collective intelligence, a rich user
experience, and many other specialized capabilities that make information more productive.
Examples: Swicki, Rollyo, Clusty, Wink, Lexxearticle link here