When I had a first look on it, I didn't like it. Now, one year later, I checked again - and now I really do:
is a really privacy oriented search engine. But under its very clear surface it also has other features:
- unbiased search results, NOT depending on any profile that you got. See http://dontbubble.us/
- privacy, duckduckgo.com doesn't save your data, nor does it turn it to the found website. See http://donttrack.us/
- instant answers (like "define:TERM"