This morning, Google alerts brought up a nice blog post on how to reconfigure SyslogAppliance's keyboard settings.
I think some users already asked about keyboard reconfiguration. However, the blog post suggest that it is much more painful to do than I thought (I agree with the author that "dpkg-reconfigure console-setup" should have done the job). I'll see that I finally include this functionality in the automated setup. It should not be too hard. After all, I have a "run once" script already in place.