You can at least draw a line from Delicious to Reddit.
Digg was originally modelled on the "popular" section of Delicious, an example of building a product out of a feature. Then Reddit saw a huge boost from the eventual Digg community exodus, after a time when Digg itself was the cultural nerve centre.
Digg was originally modelled on the "popular" section of Delicious, an example of building a product out of a feature. Then Reddit saw a huge boost from the eventual Digg community exodus, after a time when Digg itself was the cultural nerve centre.