I hope TomTom will try to defend these patents. VFAT is one of the most dangerous patents that Linux potentially infringes on, while it's needed for interoperability with many devices. Samba (precisely CIFS) could be another such minefield.
I hope it will be enough to convince the court that VFAT is actually obsolete filesystem with many modern (and free to use) replacements available, and the only reason to use it on devices is to have a readable/writable Windows drive (which means to support a 90%-market-share OS).
Also, maybe TomTom's device doesn't _create_ anly long filenames, in that case they are not even guilty for infringing the VFAT patent.