Nice to see a search engine expanding its search offerings, instead of reducing them. Blekko (slash the web) has been innovating a lot recently, and has just updated its search interface. If you run a search, this is the type of thing you'll now see:
There is a colour coded set of categories to the left of the screen, and results are organised into those curated categories. Each category can be expanded to show more results, and a right/left arrow allows searchers to move between results. The category can be reduced in size by simply clicking on it again. This new layout results in more results per page. It's nice and smooth, and I was impressed by the speed. Of course, this also means that it works well on mobile devices. (It's worth saying that this only works on web search, not video or image search).
Blekko is an excellent search engine, and if you're looking for an alternative to the 'big guys', then it's worth giving this one a chance.