And it works with news.yc.
Then it takes me to the "merge with your existing Hacker News account", and I type my correct username/password, but then I get redirected back to News.YC and a blank page at something like http://news.ycombinator.com/x?fnid=j3tO1pS8ox
My apologies, arc is a tricky language :). I am going to fix it and hopefully pg will be able to push it soon.