Can this tool bring us closer to cracking the new devices?
It is not a new tool! This tool already exists since May 2011 with aerlier beta versions.
TomTom Content Transfer Assistant v1.0.1
Tomtom has a "ContentTransferAssistant" that transfers stuff from the
PC's harddisk onto a via/800/1000/etc, it's a standalone application.
-The following TomTom navigation devices are supported:
From old device: GO x50, GO x40, GO x30, GO x20, GOx10, GO classic
XXL, XL, Start, ...