The December 2007 Tip from Mary Ellen Bates, of Bates Information Service, is on All the OTHER Search Engines, and you know what that means.
Excerpt from the December Tip (see also the archive of her Research Tips):
“Yes, we all Google, although I have recently started Yahooing more than I Google. But there are far more search engines out there than Google, Yahoo, Live.com and Ask.com. It is almost impossible to keep track of all these other search tools; fortunately, other people have taken that job on. Note that the sources I have described below are not meta-search engines such as Dogpile.com; that is, they do not execute a search across a number of search engines. Rather, these are tools to identify the search engine that may best meet your research needs….”