If you have been looking for an answer on google to "How can I add a Tweet button to Wordpress Posts" - Here it is!
Before introducing the Zemanta -Wordpress Partnership, Wordpress had announced its integration of TWEET button (as Facebook LIKE). This does not appear on the entire blog but on individual posts, which is good enough! Much to the reprise of Wordpress.com users.
Again, Very easy to activate.
1. Go to your WP Dashboard > Extras
2. Check the 'Show a Twitter Tweet button on my Posts'
3. Start Tweeting!
Awesome move by Wordpress, Whats next in line... Facebook Like? ;)