It will be interesting to start seeing del.icio.us results along with Yahoo searches. It is an intriguing blend of search bot and human powered input!
Delicious Integrated Into Yahoo Search Results: "I just got word that Yahoo is testing the integration of Delicious user generated bookmarks into Yahoo search results pages (Yahoo acquired Delicious in late 2005). Some users will see the Delicious icon as part of their normal search results, which tells them how many people have bookmarked those pages, as well as the tags people have supplied for those pages."
Give it a try here.