Following-up to TomTom (who have ever since our "GPL issue" been very friendly, helpful and cooperative) more than half a year ago, we've now discovered that the NaviFLASH personal car navigation system also runs Linux (and is not distributed GPL compliant).
As it seems, the same or a very similar device from THB Bury might be installed in Bugatti cars. Obviously we have no way to tell whether those cars were sold with a copy of the GPL or not. Anyone wants to do a test purchase? ;)
NaviFLASH have been contacted, let's see how they will respond.