A record of Hacker News as a snapshot in time. Also, as all the links have been tagged, it could lead to some interesting information visualisation, for example

A record of Hacker News as a snapshot in time. Also, as all the links have been tagged, it could lead to some interesting information visualisation, for example - how the distribution of links has changed as hacker news gets older. Edit: It also offers a new metric of how popular a submission is.