If you want more diversity in your search results, this Greasemonkey script replaces Google's ads with results from Image Search, Google Video, Wikipedia articles and definitions from Dictionary.com. There's no clever algorithm for the order of the panels, so you'll see them for every query that returns results.
It's up to you to decide if the slower-loading multimedia results are more useful than Google's sponsored links. An interesting idea for this script would be to take into account Google's recommendations for specialized search engines (for "Lars von Trier" Google recommends to try Google News). To install the script, you need Firefox and Greasemonkey.
