Something as simple as using unique icons on your blog can make your blog stand apart from the rest. These free hand drawn social media icons come in four sizes, transparent png, and quality resolution.
This free social media icon set contains some unique icons: Skype, PayPal, Google. However the Social bookmarking sites aren’t included (i.e. digg and technorati).
The icons are already sized to: 16×16, 32×32, 64×64 and 12x128px.