I've been working on one for a while with a partner. It's www.affiliateunleashed.com It's quite a bit more than just a tracking system but it tracks very well. More information to come as we get closer to launch. You may be interested in getting more updates via the newsletter. We're going to be giving away some really good prizes over the next month as well. Expect a release sometime in mid January
use open ads openads.org You can config for different tracking CTR, Conv But anyway their setting is quite complex. Not really ez to learn
openads don't give what keyword convert, the best way is create a custom php script, it worth the try. Volknet have create one, i'm sure it will be a good one
i saw some of the PHP scripts, the only problem is that i don't want the AM's to see which keywords are working for me... anyone heard of http://keywordXRAY.com ? looks like something worth checking out....