Through use of a proxy application, you can associate your Twitter and Facebook accounts with your blog and its users. Once you publish a new post, you can then choose to automatically broadcast a message to any accounts authenticated with the overall blog or your current logged-in user.
The Social plugin makes it easy to aggregate social-network mentions and responses within your blog. View them all together or filter by originating source.
When publishing to Facebook and Twitter, the discussion is likely to continue there. Through Social, we can aggregate the various mentions, retweets, @replies, comments and responses and republish them as WordPress comments.
Choose the networks where you’d like to broadcast your blog post, and customize the title and content accordingly.