LightPull

LightPull is the world's first Blog hub with two-way sync. Unlike other social networks, when you share your blog content on LightPull, any comments threads are synchronised with your blog, so that comments here, and on your site, form one big conversation rather than lots of fragmented ones. And you get full moderator rights in both places. We have thread up- and downvoting, and the best  and most popular content will be shown on our homepage. We also give you extensive social sharing options to help you get there. Full instructions on how to get started are here.

Instructions. LightPull can be installed using the one-click install feature in your WordPress dashboard. Go to Plugins, Add New, then search for Lightpull, then click to install it and activate it. You also need a LightPull account, which is free and can be obtained from LightPull.org.

1.0.0 Major rewrite, with automatic API generation and cues for account synchronisation. 0.3.0 Significant upgrade of LightPull into a complete Social Blogging platform. Also further UI improvements. 0.2.1 UI and Documentation improvements 0.2.0 First Public Beta