Byrne Reese, platform hacker extraordinaire over at Six Apart has posted a detailed article on how Vox is using OpenSearch as part of its platform API. Not only is the Vox implementation of OpenSearch text-book perfect, it also uses Yahoo's Media RSS extensions for rich data types. This is precisely what I had hoped to see when drafting OpenSearch to be an extensible and open format.
Congrats to Anil and Byrne for not only creating a fantastic product with an elegant user experience, but also one built on such solid technical foundations.
See also Sam Ruby on Open Media Profile.
(BTW, who took username "dewitt" at Vox? Inquiring minds...)