Do your users actually use those social bookmarking icons (ShareThis/AddThis)?
patio11: On my non-technical site, I got about 1 add in the last 100,000 page views.  Its mostly a waste of screen space and user attention.However, when I publish pillar reference content aimed at geeks, the simple Delicious button which shows number of people who already added it performs VERY well for me.  (Incidentally: that social proof is totally missing with ShareThis/AddThis/etc.  I wish they would incorporate it.)Delicious also generates long term traffic, whereas most of the other social sites do not.