Right -- but there's a lot of important stuff that isn't Hacker News. Just because it affects people doesn't make it Hacker News and just because it involves the Internet definitely doesn't make it Hacker News.
see my reply above for hopeful clarification on how wikileaks is different from your typical "important stuff".
Ignoring the content of these files for a while, it seems to me that nobody is too concerned with the fact that the US government managed to lose 400.000 secret documents and what implications this might have for future conflicts.