Searching the Web in the Yahoo! Directory

Search Engine Watch
Provides tips and information about searching the web, analysis of the search engine industry, and help to site owners trying to improve their ability to be found in search engines.
www.searchenginewatch.com
PubSub
Allows you to subscribe to queries that are then matched against newly published information from sources such as blogs, newsgroups, and SEC filings.
www.pubsub.com
Wikipedia: Search Engine
Article describing the history of search engines, their technologies, and challenges.
en.wikipedia.org/wiki/Search_engine
Soople
Provides a page with individual search boxes that take advantage of the advanced search options on Google.
www.soople.com
SearchTools.com
How to choose and implement a search engine on a web site. Also has information on robots, indexers, search servers, and related topics.
www.searchtools.com
Traffick
News and commentary on search engines, Web portals and browsers, and Internet marketing. Features a guide to portals, search engines, and webmaster tools.
www.traffick.com
Search Engine Lowdown
Search engine news and marketing commentary.
www.searchenginelowdown.com
Meta-Search Engines
What are meta-search engines? When to use and not use them?
www.lib.berkeley.edu/TeachingLib/Guides/Internet/MetaSearch.html
John Battelle's Searchblog
Thoughts on the intersection of search, media, technology, and more.
www.battellemedia.com
Can't Find On Google
A repository of failed queries.
www.cantfindongoogle.com
50 Matches
Crawls sites where users have voted for or bookmarked popular URLs, including Digg, del.icio.us., and Reddit.
www.50matches.com
Search Engine History
Overview of the history of search engines and search technology.
www.searchenginehistory.com
cl1p.net
Acts as an Internet clipboard, allowing users to copy and paste information between computers.
www.cl1p.net
Sugarcodes
Create shortcuts to frequently used search engines, shopping sites, and web destinations.
www.sugarcodes.com
compare-stuff.com
Compare the popularity of any two given searches by entering a comparison term.
www.compare-stuff.com
TEK Project, The
Working to build a low-connectivity search engine for use by people at the far side of a bad telephone connection.
tek.sourceforge.net
Search Engine Herald
News and analysis of the search engine industry.
www.searchengineherald.com
Multiservice Search and Comparison Using the MetaCrawler
Paper from 1995.
www.w3j.com/1/selberg.169/paper/169.html