This plugin hooks into Twitter Tools to use the shortlink that your WordPress powered site already has internally to WordPress (the software). This allows you to keep your brand when tweeting, while not running into the 140 character limit (or at least, that's the goal). Where it used to tweet the link as
http://your.domain.com/2010/04/this-is-some-funny-or-creative-title/
, it will instead use
http://your.domain.com/?p=1234
, where
1234
is the post's ID that is used internally.
Comments, questions, suggestions? Get help and support at
http://wordpress.org/support/plugin/use-domain-shortlink