Please do allow other sites to use HN logins. Then the community could develop useful sister services. For example, a site where HN members can upvote and rate

Please do allow other sites to use HN logins. Then the community could develop useful sister services. For example, a site where HN members can upvote and rate different development tools, libraries, IDEs, management tools, etc. All with backlinks to HN discussions. It's a great community and there are many ways we could share knowledge and experience.