There's an interesting thread over on KoratFrang reporting that a Foreigner was arrested in Korat for engaging in employment without a work permit.
This is of interest only because it never happened in the past. There are half a dozen or so establishments in Korat that are in fact owned and run by foreigners without work permits, but the "work" that they do has been pretty much ignored by the police. I've heard of a couple of guys being warned by the police not to make it too obvious, but that's it.
I guess this signals quite a change for how business will be done, at least in Korat.