This is a fascinating concept that is extremely thirsty for some attention. I admin an e-mail server for a small company and have been manually black listing IP ranges from all countries except USA and Canada. This stops about 95% of spam.
What the internet sorely needs is the ability to WHITE list country IP blocks at the firewall. There is a thread on DD-WRT about Asia Block, and I think it is a method of selectively blocking countires based on an updated IP table listing from ARIN. I have no idea what OPTware is, nor will I ever have the time to find out, but that is what the DD-WRT project seems to utilize for it's blocking capability.
If this concept could be refined to the point that I can place a check box on the country or region that I would like to permit packets from, and drop all others, then there would be a revolution on our hands. This would stop a huge amount of malware, spam and other internet problems. It is a natural evolution to the World Wide Web. The World Wide Web is simply not needed, nor is it practical to have your network exposed to every fuck-stick on the planet. We need to have a country white list that can keep itself updated by synchronizing with the established data bases of country and region IP addresses.
Just my 2 cents. Nothing wrong with dreaming big !