See the AltaVista review from Search Engine Showdown for more details. Psychcrawler Psychcrawler is sponsored by an organization with knowledge of the topic, the American Psychological Association. This should help by making sure quality material is crawled. Most likely not. With that said, do not forget to browse.
Serendipity can be the searchers' best friend.
Browsing is also a great way to acquire new sites for later exploration. These tools can be very valuable when searching for news and other current event topics. Also, this is another great way to focus your search and limit the potential number of documents you have to search through. This search tool from ABC NEWS uses Ultraseek software. See the Infoseek review from Search Engine Showdown for more details.