I am the author of the original HNlike button http://news.ycombinator.com/item?id=2934178

I have since then modified the Like button (www.hnlike.com) such that it acts as a submit button if the link has not been submitted yet. If it has already been submitted, it simply links to the discussion page in Hacker News. See it in action here: http://hacksandthoughts.posterous.com/

Nice work, jermaink!