Mod to add AddThis and ShareThis type service?

[TWood]

There are a variety of services that combine all of the social bookmarking sites into a single icon, such as AddThis and ShareThis. When you click on them they open a window that lets you select from dozens of sharing sites/methods. I can kludge one of those two into my site but I was wondering if there was already an existing mod that did an elegant job of adding them, or something very similar.