I can't seem to get this to work on news.yc, at least with my self-hosted OpenID (http://openid.dfranke.us). I go through my portal and then the Clickpass portal and get redirected back to a news.yc closure URL, but it just gives me a blank page and doesn't log me in.
If you want to skip the intermediate pages, http://disqus.com/login and https://www.plaxo.com/signin :)