Try to use this plug in leave a comment on your blog. This is a good Social Networking Comment Plugin, that allow your blog visitors to leave comment and login with their social networks account like Twitter, Facebook, Paypal, LinkedIn, Hyves, OpenID, VKontakte, Google and Yahoo.
The Social Login Plugin is developed by OneAll, a technology company offering a set of web-delivered tools and services for establishing and optimizing a site’s connection with social providers such as Facebook, Twitter, Google, Yahoo!, LinkedIn amongst others. This is a professional though free plugin that allows your visitors to comment, login and register with social networks. So you may use this plugin to make your blog visitors easier to leave a comment.
You can setting, the comment formular, the login page, the registration page. And nicely, the login widget that you can easily put on sidebar of your website. And this plugin is supported Social Networking such as : Facebook, Twitter, Google,LinkedIn, Paypal, Yahoo, OpenID, WordPress, Hyves and VKontakte.
Try make your blog easier to leave comment with this plugin, download here.