I am looking for a web based or stand alone scraping service. Features are as follows:
Results displayed based on the keyword/keywords (these keywords are added and delted based on the need)search must be scraped and place them in Data base.
All search sites, google, yahoo, ask etc...must be scraped.
Facebbook, twitter etc must be scraped based on page id or post id.
all parameters like, website name, time and date of post, username etc must be extracted and placed in the db along with the post content.
open source technologies are preferred.