No because they can't make cross-domain ajax calls. And they can't make requests on behalf of very many people on their server without hammering the HN server.

No because they can't make cross-domain ajax calls. And they can't make requests on behalf of very many people on their server without hammering the HN server. Even if they were willing to ask for people's passwords. We thought about this question extensively while building http://hackerstream.com http://hackerstream.com