I am beginning to think that Social Bookmarking tools like OnlyWire and AddThis are more of a problem than a help. I often notice my social bookmarking showing up in SERP results....but for only one site...whether it be Redditt, Digg, Stumble, or jumptags. If you mass submit the same bookmark....does Google treat them all as duplicates? Would you be better off making a unique bookmark by hand at each social bookmarking site?
Hmmm, it is a debatable question indeed... You can always submit the subpages in various bookmarking sites in this case (of course with different titles and descriptions)...