The other day Google launched its AJAX Search API, which lets you put a live Google search box on your web site. I'm not talking about the plain old static search box that everyone's had since the birth of Google; rather as the name implies the new API uses Ajax to make search results appear live, embedded in your site, when the user clicks on "Go." The most basic use of the API requires only a copy-and-paste into your site's source code, but if you know some JavaScript and are willing to roll your sleeves up, you can accomplish a lot more with the Google AJAX Search API. You can customize what results are shown (e.g. Images, Videos, or Blog Search), add local and map search to your site, give users locale options, and let users append  search results to things like blog comment forms. Check you what you can do with it on the Examples Page.