Logo idea for those who would like to run with it: A constellation without the lines, with purple stars. Could be a real constellation, or the letter N or something else.

It represents decentralization, without the lines it's not blatantly obvious (requires 'work' to puzzle it out), and it contains a nod to existing nostr 'branding.'

Spitballin. I do love a lot of the logos that have been suggested today though.