The latest release is now available in the store! It was actually released on 12/28/2012 but this blog was just started today.
This version includes a few bug fixes so if you were experiencing odd behavior with certain functions, this update may help.
New to this version is the ability to preview all of the changes that will be made to your file names before you accept them. This can certainly come in handy when you are dealing with very large numbers of files.
Also new is support for regular expressions! This is an advanced feature that may not make sense to the average user, but if you do some research online you can find some very cool ways to change your names to anything you want with minimal time required. Here is a good site to start the learning process: http://www.regular-expressions.info/examples.html
Keep up the feature requests! I am always looking for the next set of features to add.