In reply to Chip Bennett.

I simply can't trust leveraging a 3rd party plugin to provide sharing in a publicly distributed theme, and make it look good, without any issues. I've been burned by one to many vendors, which in turn reflects badly on the theme author.

What happens when the plugin isn't supported anymore? You work more to find another plugin that works with the theme to recommend to users when they are complaining that your theme doesn't' incorporate social sharing?

I don't see that being sustainable, in the long term.