Ask HN: Who is your sounding board?

Do you have a couple of good friends who you bounce your ideas off? Do you throw your ideas out on twitter, and see if there's a response? Do you keep a blog somewhere with all the pieces of something (possibly) that pop into your head?

I want to know who you use as your sounding board. Are they someone who 'gets you', who easily shares your vision, or someone who can quickly spot the strengths and more importantly weaknesses of your ideas?

Personally, I have a few 'trusted' friends who I know will listen to my ideas, but aren't afraid to point out when I'm being an idiot. I've been known to flood an IRC channel at times trying to get all my stupid thoughts out before I forget them.

I've tried blogging, text files, and carrying a note-pad, but being able to bounce ideas off a real person (and one who doesn't just say "yeah, that sounds great" in a disinterested tone) is by far the most effective way I've got of fleshing out ideas.

So what works for you?