If search engines are the rainbow, then Google is the pot of gold at the end of it. Everybody aims to rank high in Google, more than any other search engine. Why? Due to the fact that Google is the most used search engine around currently, many people figure that is where they will get the most visitors from. However, that doesn’t mean the rest of the search engines are chop suey either. Yahoo and Bing(formally Live Search and MSN search) don’t get anyone using them. So the goal should be getting listed in all the big ones(including Yahoo! and Bing) and little ones(Ask Jeeves, AOL, ect). They all can get you traffic and help you grow your site. So the big picture ought to be getting indexed in as many search engines as possible.