The search engine world really is like a revolving door. One goes out (Blekko) and another one comes in, and this time it's a multi search engine called Instya. The idea is simple - choose the subject area of your search, such as web, images, news, video, shopping, answers, social and then type in your search term. Next choose the search engine(s) you want to search. These will differ according to the subject area that you're looking at, so web engines obviously include Google, Yahoo, Bing, Duckduckgo and Yandex, while video covers YouTube, DailyMotion, Vimeo and so on. Then simply run the search. You can run one search engine at a time, or several simultaneously.
It's nice and straightforward. Worth a look.