There are two search engines that have promise that made themselves public in 2010: DuckDuckGo and Blekko. DuckDuckGo has active search spam removal, you can access it via secure HTTP (HTTPS), and is a search engine that also relies on crowd sourced data.
Web of Trust has reputation ratings of over millions of websites, and has an active community of about 15 million users now. Best of all, there’s no bots doing these ratings, but community members (trust metrics are crowd sourced).
Gabriel Weinberg, the founder of DuckDuckGo is looking for ideas on how he can further integrate the WoT data, and has a thread at the DuckDuckGo community. Feel free to chime in on that, and lets see more search engines implement such data (even though you can already get such data if you have the browser plugin installed).