Preferred sites feature in Google search

Alex Chitu describes an experimental feature currently in A/B testing on Google where searchers can add "a list of sites you want to appear more often when you search."

More information on the Google help page for the new feature.

Seems like an interesting blend of SearchWiki (which lets people manually reorder Google search results) and Google Personalized Search (which automatically reorders search results based on your past search and visit behavior).