Yeap, and those topics have nice pictures of real & counterfeit notes to help people identify the fakes:

http://www.thaivisa.com/forum/Counte...r-t231432.html
http://www.thaivisa.com/forum/Fake-B...2#entry2419872


As for seanthepilot's question about the prevalence, my wife (a Thai) has seen reports of it all over teenee.com, and I'd read about it over a month ago on some expat forums. We've been on a 6-week holiday outside Thailand, but it sounds like they're definitely out there, and not just in the tourist population.