Finally - Blogger now have added share buttons as standard - Hooray!
Take a look at this post from Blogger Buzz for all the details. It's really easy to do, go to your dashboard, open up 'design' and go to page layout. You then need to click on edit at the bottom of the section titled blog posts. Scroll down and turn on the sharing option! Easy peasy - thank you blogger!
Please do share this post! Are they working for you?