Ask HN: Where online to get feedback from Graphic Designers?

I think there is some of us here. I'll give you feedback if you write up your product idea.

I agree with lovskogen. There's a number of designers / UI guys mixed in here on HN. Feel free to email me or make a Ask HN's Designers post.

You may get better response, if you google 'graphic designers forum' and list the ones you've posted to and then ask if you've missed any.

Check out Forrst or Dribbble