Another good one is ShareThis
ShareThis - Sharing to Email, AIM, SMS, Social Networks and Social Bookmarking In addition to integrating into social bookmarking sites, it also includes a way to e-mail the post to others. Very neat.
You may also want to check out the first free social media newsroom or pressroom theme for WordPress. You can download it at
http://www.fathomseo.com/pressroom/m...room-theme.php