Better read this guys: Especially #2 where an affiliate had to pull his whole site because he wrote about gambling and had ads. Nothing to do with WHERE the gambling companies were based - only had to due with fact HE was in US and promoting them. (He was in Washington where laws were stricter, but not sure if other states have adapted anything similar._
Gambling Affiliates Can be Prosecuted Due to New Law
Warning - Affiliate Casinos and Gambling Links Can Get you Busted