What are you hoping to gain by the "Show HN" post?
Feedback from the smart users on Hacker News.
they totally ripped your UI, did you attempt to contact them?
I did but they didn't answer. I really think it's a waste of time. Even though they have some users I can't see any effect on the growth on Iconfinder.com
I have chosen to focus on delivering the best service and hope the users will notice.