I launched BuckBuckMoose.org recently so I could start using DuckDuckGo more often. The idea with BuckBuckMoose is that you can search DuckDuckGo without fear of missing out on Google. How it works is you simply enter your search query, and then a two split screen windows pop up with Google search results on the left and DuckDuckGo results on the right. If you want to try it out as your default search engine you can use Tom Schuster's "Add Custom Search Engine" extension for Firefox to add it (BuckBuckMoose) as your default search engine. (I don't actually expect anyone else to use it). Anyway, having used this tool daily for the past few months I feel that I'm somewhat of an expert* on DuckDuckGo's search results. One interesting thing I've noticed is how similar their results are. It's almost as if Bing is trying to mimic Google's results on purpose? It's a little odd. The results are pretty good tho. However, I have noticed that Google is always a little bit faster.
It returns results from the major search engines (and can be customized for more) while attempting to maintain privacy as much as possible. I'm not sure how effective it actually is from a privacy standpoint, but being able to see aggregate results in a single, clean UI has been a big productivity boost for me. I've been running a self-hosted instance for a few months now and haven't had major complaints.
If I'm logged into google do I get my customized search results? Would be nice to have a choice on this behavior (actually, would be interesting to have an iframe for each mode to see the difference in results).