According to All things D article : http://digitaldaily.allthingsd.com/20090519/microsoft-to-debut-new-search-at-d-all-things-digital/

Microsoft will give demo of kumo (kumodemo ^^) during allthingsd D7 on May 26 to May 28

http://digitaldaily.allthingsd.com/files/2009/05/kumo-300x168jpg.jpeg

Didn't we see Kumo before, unreleased... kumodemo haha, that's cute!