Search Engine Simulator
Search engines like Google, Yahoo and AltaVista display results based on secret algorithms. No outsiders know the equations, but we know that these are based mainly on keyword frequency and link popularity.
allows webmasters to see what their pages will look like on a search engine's result page.
Note: This service ignores the META tags that few search engines honor.
Google offers a few tips at this URL: http://www.google.com/webmasters/4.html