You don't see many new general purpose search engines emerge these days—the major players pretty much dominate, and it takes a lot of resources to build and maintain a world-class search engine that can handle millions of users.
But newcomers still spring up. Yesterday we had word of BigClique, a new crawler-based engine. Another new search engine worthy of your attention is Exalead, writes guest writer Mary Ellen Bates in today's SearchDay article, Introducing a New Web Search Contender. In addition to a respectable index, Exalead offers some power tools not found elsewhere, making it really useful for certain types of searches, especially when you're just not getting what you need from one of the big boys.