Came across this when searching for a new share button. Works great for the most part! One thing I noticed in transitioning to this new button is that my Facebook meta-data doesn't appear to work. In addition, the links that are being shared on my website are very long-- it'd be great if you included a link-shortener in your code!
Just my thoughts.. works great and I hope I can get it working with the same functionality as my last plugin!
edit: In addition, it'd be great if you added an "email" button in there as well!