On-Topic: Anything that good hackers would find interesting. That includes more than hacking and startups. If you had to reduce it to a sentence, the answer might be: anything that gratifies one's intellectual curiosity.
It can't be off-topic shit if it is within the topic guidelines set by the site, by definition. You could always go away and run your own site if you think the attitude of the mods and community here are worthy of shame.
On-Topic: Anything that good hackers would find interesting. That includes more than hacking and startups. If you had to reduce it to a sentence, the answer might be: anything that gratifies one's intellectual curiosity.
[1] http://ycombinator.com/newsguidelines.html