My project is in its version 02 codenamed Epping with some bug fixes and a new feature. Discover it in sourceforge at http://justrename.sourceforge.net or in http://www.sourceforge.net/projects/justrename
If anyone wants to collaborate, do it and let me know. Although at the moment not tailored for the Linux platform, it is an Opensource Free Software Project. If anyone, knows about (or wants to learn) GTK# and Mono and would like to port the software, it would be a nice exercise.