[xxqs]

why not publishing them in a personal blog and sending links in various social platforms, like HN or google+?

although with HN, lots of topics remain neglected, especially if they appear in non-US daytime

[chalst]

lots of topics remain neglected -- Breaking your idea down into two or three pieces as a series of posts to your blog and linking them from HN can overcome this, and it might help you organise your ideas better.

Postscript - Per HN noise factor: do be aware that most HN readers are not as excited about your idea as you are.

[xxqs]

... and it will pollute HN's topic flow even more :)