I really love this plugin and would like to make a suggestion for improvement.
Currently, the plugin only allows to change the WP logo in the upper left corner to a custom logo of the same size. The following two changes would really improve this function:
1) Allow to replace by bigger size images
2) Create the option to add a custom menu when hovering this logo
You could have a look how it is done in this plugin: http://wordpress.org/extend/plugins/custom-admin-bar/
Of course one can use both plugins at the same time (which is what I am doing now), but wouldn't it be great if it would be included in the greatest white labeling plugin out there?