I recently implemented social bookmarks on MMA Ratings. It was quite challenging for me since I only wanted the bookmarks to appear on select posts. I found what I was look for at MarkenMedia.However, I still wanted to customize things. Its amazing what a little searching can do. Sure enough, whenever I need help coding, I wind up on W3schools. Now my javascript lays out my bookmarks in a neat table complete with transparency. You can check them out here.