I noticed really nice social bookmarking on several blogs but it took me a while to figure out that what they use is SexyBookmarks. It’s bookmarks are clearly visible yet not ‘in your face’, I find them attractive and it’s easy to share a link.
Though the name may be a little “edgy” for some, SexyBookmarks has proven time and time again to be an extremely useful and successful tool in getting your readers to actually submit your articles to numerous social bookmarking sites.
I signed up for bit.ly and use that as URL-shortener in SexyBookmarks. The plugin handles lots of bookmarking sites plus Twitter and email. The Twitter option gives a clean nice tweet with your username in.
I think SexyBookmarks is too big for the bookmarking I need.
For current plugins at this site: see WordPress Plugins I Use.