Some may find it too cluttered and overwhelming. MetaCrawler is a very good basic metasearch site for the Web. Unlike HotBot, it is uncluttered. It searches 5 or 6 of the basic search engines and the results of a search are limited to items with the highest relevancy to your search terms. This can be an advantage in that the search is completed quickly and you don't have to wade through a lot of sites that are not really what you wanted.
ProFusion is a lot likeMetaCrawler.
However, it is newer, more advanced, covers about 9 or 10 of the basic search engines, and has more options for refining a search, all without being overwhelming. It generally retrieves more items than MetaCrawler, the relevancy remains very high, but the search takes longer to run. When I searched on this keyword for this column, MetaCrawler retrieved 34 items and ProFusion retrieved 67 items. Use MetaCrawler to become familiar with the metasearch concept or if you are sure about the specific name of a site, and then move on to ProFusion when you feel you want more. Directories Yahoo is the most comprehensive listing of all Websites.