I have been using Digg Digg for about a year on my Blog; initially it saved a lot of time - which would have been spent developing my own solution.
Digg Digg makes it easy for people to share my content. It is also makes it easy for blog owners to add and remove social sharing buttons. Now that the Buffer Team has open sourced the code I hope that other developers like me will help make Digg Digg even better. (Worthy of 5 stars)