This seems a cool plugin. But before I found the time to test anything I got an error.
The plugin page in the admin fails if any plugin is activated after this plugin has been activated. In the error log you find the message:
[19-Mar-2012 16:53:37 UTC] PHP Warning: Cannot modify header information - headers already sent by (output started at /usr/www/userxxx/wp-content/plugins/widget-settings-importexport/widget_data.php:463) in /usr/www/userxxx/wp-content/plugins/additional-image-sizes-zui/init.php on line 74
I've tested this with plugins Additional Image Sizes (zui) and Import Users from CSV.