First off, awesome job! This works great, and I love the caching feature.
I was wondering if it's possible to get the enabled counts added up. For example, I have the twitter, Facebook and google counts showing. I'd like to be able to combine them to a grand total so I can show something like this:
Join 50 others who follow this site.
20 on Twitter, 15 on Facebook, 15 on Google+.