(original: http://iworkwithcomputers.com/2008/11/13/greasemonkeyretweet-script-update/)
I’ve once again updated the Twitter Enhancements: Retweet script, by adding a dialog box when retweeting. Previously, you had to be on Twitter’s home page in order to use my updated Retweet, with AJAX functionality. Now, you can be on any twitter page (aside from the Direct Messages page) and click the Retweet button. It will open a jQuery modal dialog (thanks to Eric Martin’s SimpleModal plugin: ).
You can find the script here: twitter_enhancements_ret.user.js
Or over at userscripts.org: http://userscripts.org/scripts/show/40414
Screenshot of Retweet in action