If you wish to add social networking icons linked to your profile pages on the respective sites for (stumbleUpon, linkedIn, DIgg,Reddit, and Tumblr) to your sidebar whet you do is cpature images of the cions and link them to ypur profile page and display them in a text widget. http://en.support.wordpress.com/widgets/text-widget/
Your theme Traction is a premium theme and read-access to the premium themes forum is now open to all users so it's possible it has special widgets I'm not aware of. You can search to see if your question has been previously asked and answered there. The premium theme forums are at http://premium-themes.forums.wordpress.com/ with separate sections for each theme.
If you are not successful when searching there is a link for the specific Premium Theme support forum for your theme under Appearance -> Themes in your blog’s Dashboard, but do note that the premium theme must be active and you must be signed in as the user who purchased it in order to see it and post to it.