SearchMonkey is a developer's platform released by Yahoo earlier this year. But in order for searchers to make use of the apps, they must first be approved by Yahoo.
Now Yahoo is letting developers find an early audience by allowing apps to be classified as experimental before they're approved. Searchers can use the apps like they're a hotel swimming pool - i.e. at their own risk.
Want to test out some experimental apps? Click 'Show Experimental Enhancements' at the bottom of the SearchMonkey Gallery applications directory page.