Hi, I was doing social bookmarking for few sites for last few weeks. All site were slowly came in first page for a particular keywords. suddenly in last few days ranking has been dissappear sites are nowhere in first 10 pages. I have used best social bookmarking sites like delicious,digg, reddit,cannotea etc. I am not able to understand what happened. I have not one any black hat technique or not even used any other content. Your reply will be appreciated.. please let me know what I have to do now for getting those site again in first page ...