Ask HN: What is something you want to share but can't because of an NDA?

This is totally doable depending on the NDA, you just can’t say the company or specific identifying things. But you could say that a large wallstreet or oil company has been using raspberry pi’s for trading and calculations with custom code. Etc etc. this dances around the specifics but still could be interesting. (The above is entirely made up).

Per the terms of my agreement, I could tell you but then I'd have to kill you ;)

Isn't this question a bit contradictory? "Disclose the details of your non-disclosure agreement."