A warning on the download page that you are not allowed to download if you are in the US or Japan, and are not allowed to export it to there, could be legally enough to make sure you cannot be sued by their laws.
Actually, the recent Microsoft vs. Lindows case disproves this. A Dutch court decided Lindows, Inc. was still infringing on the Windows name, because even though Benelux (Belgium, Netherlands, Luxembourg) visitors were directed to www.lin---s.com and download Lin---s OS, they could still access www.lindows.com and get Lindows OS if they wanted to.
This forced Lindows to change the name of their product to Linspire world-wide, even though they just lost the case for the Benelux!
So setting up a warning is not enough! Even if you block IP's from certain countries, they could still access through a proxy, and you'll still be liable.
Besides, I'm not convinced that european copyright laws are more lenient on the matter of game cloning compared to USA or Japanese laws.
Greetz,
Patriek_______________________________________________ MSX mailing list ([EMAIL PROTECTED]) Info page: http://lists.stack.nl/mailman/listinfo/msx
