I post as all my author names, plus for the Cozy Chicks, which has proven to give me a lot more visibility. Win-Win situation. And because of Meet Edgar, I've seen an uptick in followers for all my categories/names.
Here's an example of one of my posts.
I haven't found it as useful for Facebook--but only because FB will suppress a post with a link. There are ways around it, but not using Meet Edgar, so I'll continue to just use it for Twitter.
In the meantime, I hope they're looking to connect with other social media -- like maybe Tumblr, Instagram, or Google+ -- that's on my wish list.