Above all I'm left feeling that, while the concept is neat, it could be done a whole lot better, with more creativity, intelligence and finesse.

Above all, it's not searches that users need to share, but results. This has already been successfully done with , which tags sites according to shared topics, but there's significant room for expansion in new directions.

Unlike the other search engines mentioned here, DuckDuckGo appears to be just another search engine in the same mould as Google. However, it respects privacy and doesn't record search results or track you ().

It also boasts intelligence that lets it try and figure out what you're searching for, and presenting it in a red box at the top of the search results, drawing information from sites like Wikipedia and Wolfram Alpha in order do so.