This one? http://github.com/adamalbrecht/hacker-news-for-chrome http://github.com/adamalbrecht/hacker-news-for-chrome Just tried it, there doesn't appear to be

This one? http://github.com/adamalbrecht/hacker-news-for-chrome http://github.com/adamalbrecht/hacker-news-for-chrome Just tried it, there doesn't appear to be a way to check if a URL is already posted or not