From Sean Billig:
A Dashboard widget for browsing Wikipedia. Search for articles and view from the Dashboard, complete with pictures and links. Now scroll-wheel and keyboard scrolling compatible. Wikipedia pulls up entire wikipedia articles, complete with pictures, for viewing from the Dashboard. Wikipedia is compatible with any language wikipedia, just enter the 2 letter code on the back. Defaults to English. Click the wikipedia.org button to the right of the search field to open the current article or search term in Safari. The little ? button to the right of the search field will pull a random article into the widget (Special: Randompage query).