Hacker News is horrible for archiving, though. The affordances work against a strong community memory, unless there's a secret 'best of' list I don't know about.
The trouble with HN's archives is that most of the 1.5M stories [1] that have been submitted are junk, so it can be hard to track down the gold. At the same time, there's a great deal of gold there, including much that never got the attention it deserved. We've been toying with ideas about how to reclaim some of it.
[1] The number is 1,472,221 as of two minutes ago, if anyone cares.