Yometa.com has launched a visual search engine, which presents the results from Google, Bing, and Yahoo as a Venn diagram on one screen.
According to Yometa, there is a 3% overlap in search results between the top three search engines for the top 100 search terms because each has different algorithms for determining importance and revelance. Yometa's visual search engine presents all three engines results simultaneously, allowing the user to gain a broader range of results.
Data can also be sorted by date and relevance. In addition, search results can be viewed from only one engine of choice or in combinations (i.e. Google/Yahoo, Google/Bing, Yahoo/Bing).