DogPile describes itself as "All the best research engines piled into one" (combining all the best search engines into one). In fact, DogPile does integrate Google, Yahoo Search, MSN Search, and Ask Search (naturally, it doesn’t include our Baidu). Not only does DogPile support web searches, but it also supports image, audio, video, yellow pages, and white pages (White Pages) searches.
Meta-search engines seem to be not uncommon. If there is anything special about DogPile, I think at least its cartoon-style interface can create a sense of warmth for users. Below is a screenshot of the interface. Pretty cute, right?