Search Engines of the Future

Here is an interesting article about some new search engines (or search engine concepts) to look for in the near future. Here is an excerpt:

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.

The article then provides descriptions and links to several active search engines utilizing this third generational technology.