I had the chance to talk about Dojo at JavaOne last week, and one of the attendees, Kenn Thisted, was nice enough to create OpenSearch plugins for dojotoolkit.org and api.dojotoolkit.org:

http://mycroft.mozdev.org/download.html?name=dojo

If you are using Firefox 2 or 3, or Internet Explorer 7, you can easily add Dojo search to your browser's search bar.