When we were making mockups for the refreshed admin bar in 3.3, I created a blue version to mix things up and ended up really liking it (yes, this line appears in the plugin’s readme). So, I decided to make a plugin for it for you all to enjoy that has slightly different versions for 3.3 (currently in beta) and pre-3.3 versions with the admin bar. I am currently using it on my local development sites so that I know where I am, but it’s also really pretty with the blue admin theme. I plan to add RTL support sometime in the near future.
Available in the WordPress plugin repository: http://wordpress.org/extend/plugins/blue-admin-bar/