One of the more popular features of HNN (The Hacker News Network) was the daily list of web page defacements that was maintained at the time by Attrition.org. Maintaining such an archive soon overwhelmed Attrition and the task was taken over by Alldas. After the demise of Alldas, a small (at the time) upstart security site in Austria, Zone-H took over. They have been maintaining the defacement archive for years and years slowly adding to it over time as new websites get compromised. Their archive now encompasses over 2.6 million web page defacements. The amount of data they have collected is invaluable and is an amazing resource for security researchers to gain a historical perspective on the frequency and methods of attacks used over the years.
Lately Zone-H has had some rough times, their founder has been arrested in relation to an Italian spying scandal and they have been coming under increasing criticism from people who think their archive is actually promoting web page defacements. As a result they are actually thinking about discontinuing the defacement archive.
This would be an unfortunate occurrence if it was to happen. They are currently running a poll on their front page, (in the left column) as to whether they should continue hosting and updating the archive or not. I urge you to cast your vote and help save a valuable security research tool.