According with its home page:
coRank is a site where you can share whatever you find interesting on the web with people who value your opinion, and where you can also find what’s interesting for people whose opinion are important to you – your sources – whether they know who you are or not.
In coRank, your Front Page is yours only, and likely different than any other, as it is based on how the-people-you-select react to upcoming stories and submitted websites.
You can read about its features at Take a tour
Great job, Rogelio!