Scrape web pages in real time with Node.js

What's a good was to scrape website content using Node.js. I'd like to build something very, very fast that can execute searches in the style of kayak.com , where one query is dispatched to several different sites, the results scraped, and returned to the client as they become available.

How to extract textual contents from a web page?

I'm developing an application in java which can take textual information from different web pages and will summarize it into one page.For example,suppose I have a news on different web pages like Hindu,Times of India,Statesman,etc.Now my application is supposed to extract important points from each one of these pages and will put them together as a single news.The application is based on concepts of web content mining.As a beginner to this field,I can't understand where to start off.I have gone through research papers which explains noise removal as first step in buiding this application.