Google,Yahoo or Bing can search what you are looking for, but what about searching from the content which is fresh like twitter, microblogging and recent news. We know twitter also has a search, but what about if you want to know what is getting streamed on WordPress, CNN, Reuters, Flickr and Twitter?
Collecta is for really real-time searching, on a single page you can have multiple search . You can even pause and resume a particular search. I know it is fast, no, actually it is faster than others, but why would i like to do such search? What is the use of real time search? for business, for personal or to feed another application? I do not know yet.
Another search engine crowdeye also claims to be real-time search engine. It is good if you want to monitor how a conversations around a subject or news is evolving over a period of time. People who built it came from the Bing team of Microsoft.