Looked for something with a little more customization that all those sharing plugins with default buttons and found Shareaholic that's kinda bloated, Flare that I don't know if it has shortcode support and yours.
This plugin is good, thoug I've had 2 issues with it:
Solved first one with custom placement of sharing buttons by calling <?php echo do_shortcode('[ssba]'); ?>
Second one is about twitter and facebook buttons. When I click to share on twitter the text to be shared looks like: mysite.com http://mysite.com/my-article. When I click to share on facebook since the plugin doesn't have any sort of popup option the needed content opens in a new page but shrinks my browser as it would be a pop-up and after I finish sharing and close that page i need to manually make it fullscreen again.