I recently discovered Intelways, a nifty way to search a number of search engines sequentially. It's not a metasearch engine; it lets you click from one resource to another. Its main claim to fame is that it categorizes the tools by broad type of search -- general, images, video, news, social (blogs, social networking sites, social bookmarking sites, etc.), file-type searching, reference, academic, business, tech and (natch) shopping.
I review it in more detail in my September Info-Tip.