Let me introduce Stumbleupon and Digg first in case you never heard of this services before. (must be living on the moon for a couple of years, uhm ?) Every user may post and vote for articles on Digg. New articles are kept in the Upcoming Stories section for a maximum of 24 hours. If the article receives enough votes in that time it will be transferred to the frontpage and drive incredible traffic to the website where the article is hosted. If the votes are not sufficient it will be removed and can only be reached using the site search.