I have started adding 'digg-it' widgets to all my blog posts on all my blogs and there are several reasons why... Firstly without a doubt, someone will see your post as soon as you digg it (assuming that you might digg some of your own posts to get the ball rolling...). Your post will appear somewhere as the most recently dugg posts and if your title is interesting enough, there is a chance they will visit, if you have done really well, they might digg it too...and so the snowball is...