> or maybe small improvements as you see happen on HN like with voting, points, etc,

Hey, that reminds me. I use HN every day, but I still don't have an handle on when the arrows appear and don't and when I can edit and can't.

Is there some page somewhere that actually outlines the rules, or do I have to read the code?

I keep waiting to get the ability to downvote. Every 50 karma I get I think, "maybe I can downvote now", but it never happens.

>= 251, last time I checked.

500 actually. I got it a little while ago. That's comments only.

Other fun comes at >1000.

Like what? I am at 2k++ and haven't noticed anything.

That's because you can't remember the lack of features for noobs :) Downvoting, flagging, changing colors, etc.

Huh. Yeah, it's been awhile.

Way to make me feel old. :)

You have to read the code. What do you think this is, Reddit? ;-)

(with tongue firmly in cheek, etc. etc.)