Digital annotation

MS OneNote.

So if you want a structure to link your human language information together with other human language information, that's the exact purpose of HTML.

I didn't even see his image, because I'm using Lynx, and didn't bother to click the link. So I really have no idea what he posted. But I rarely need to make sketches (my notes are at least 99.9% text), much less any complicated sketch that can't be approximated in ASCII. Worst case I could make a simple GIF in program like xpaint/xfig, or even use a tool like graphviz. I've used these methods in the past, on occasion.
About the only time I actually pull out some paper is if I'm mapping an adventure game or RPG (I mean playing it, not designing it). Those don't need to get saved though.

Tagging onto the screenshot idea / onenote® idea, Xournal (specifically the fork Xournal++) are great if you want to annotate or do mathematics visually

Let me just find some random text I wrote years ago in my documents folder... oh wait I can't because I did all my notes on a picture my terminal/explorer can't parse.
txt (or more aptly rmd/org/tex/*roff) is infinitely more useful for notes because you can search through them and recall information much more efficiently. And as said best... who the fuck is drawing diagrams as an annotation??

Attached: girls_laughing.jpg (398x241, 29.74K)

Reported

Nobody needs or wants to literally scribble all over web pages. Highlighting text and injecting comments is plenty sufficient for most purposes. But if it isn't standardized it's not worth using.

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I don't know, personally I've been waiting for something like this for ages. Makes it easier to translate shit.

No they're not lol. Highlighting, "mind maps" and most diagrams are bullshit unless you're into electronics or some other branch of engineering. Only other excuse is formulas, for which you can use latex/lyx/word processors/whatever, or just keep it simple and use a notebook.