madKast.com (a nurtured start-up from techstars.org) has recently released an awesome bookmarking and sharing widget to aid in the viral distribution of your blog and also to give you insight into the habits of your readers. (This is a free tool for use by any and all blog publishers.)
The strength of madKast really lies in the analytics provided to the blog master. When people use this widget you get to know what posts they are sharing and what site they visit. (no personal info is shared) This is excellent information that allows you to gauge what exactly your readers are looking for. Putting you in a position to deliver that content on your blog instead of them having to go elsewhere.
I might use this
You’ll notice the little ‘addthis’ bookmark button at the bottom of this post. That may disappear in favor of this madKast widget. We’ll see what happens through the trial.