Share this provides a good route for sharing via services such as facebook & twitter (perish the thought).
Setup is relatively complex most of time with Blogger, instructions are given on screen & involve editting the HTML on the design page, however, occassionally an "add this button" button appears - I cannot quite spot the logic of when it appears but unfortunately since attempting to do the job on my home laptop the button hasn't appeared again, so manual editting is the way to go.
Also, it is a little unfortunate that whatever you do, facebook & twitter are always the options initially displayed. I've attempted to create links to other services but the naming is not obvious (the code says "facebook" in the facebook part so I tried copying and using "blogger" but that was clearly too obvious).
