Rated 4 out of 5 stars

Awesome addon, saved me the trouble of making it for myself!
2 bugs:
1 - The progress bar isn't hidden after loading is complete. This was the behaviour of the old status bar.
2 - Wasn't added automatically at install for me; of course it was a simple matter of right-clicking the addon bar and using Customize... to drag elements on.

This review is for a previous version of the add-on (2010.11.20.19). 

There is an option in the extension preference to control if the progress bar item is hidden or not. By default, it should be hidden.