Have you found openads to be too steep of a learning curve and are looking for another free solution to geo target your ads? Follow the instructions in this thread, I tested it out and it does work! http://www.fadinsite.com/showthread.php?t=24 Keep in mind that it's most useful to websites getting traffic from the USA and only one other country, as you can display different ads for USA visitors or ANY other visitors. I still found it to be worthwhile as I have a site with the bulk traffic coming from the USA and Australia. The example does state it's purpose is for displaying YPN ads to USA visitors and Google ads for international visitors, but I found it to work with CJ affiliate links, so it is pretty flexible.
Thanks alot, dcristo! Just read the thread, and it definitely looks much easier to use compared to OpenAds. Thanks again for sharing.