StumbleUpon updated its social bookmarking service last week and one of the key improvements was search. Users can now search within their favorites, friend's favorites or the entire site. The search was enhanced using community ratings and reviews.
Additional updates include UI and social features. The UI is simpler and more minimalistic. It's cleaner and just looks easier to use. On the social side of things, StumbleUpon says it's now easier to find your friends. They're also following the trend of Twitter and Facebook by enabling near real-time updates.