Thanks, I'll add it now. It's a legal gray area for sure and it will take some time for the law to catch up on the reality that many more of us will start traveling and working from different places.
http://blog.therealcostarica.com/2009/08/13/the-new-costa-ri...
It's more likely that Thailand will continue to tighten the tourist visa rules in order to prevent people staying more than a few months.
People should remember that Thailand is protectionist, xenophobic and cares very little of it's foreign population.