Tracking AdSense, in Blogger

AdSense has an easy tracking method by site URL. So if you maintain multi sites you should be able to track these sites through AdSense using the URL Channel. Turns out as soon as you use blogger they don't allow you to use URL Channels. Blogger also does no allow custom configuration to add a custom channel. I'm looking for the trick know and I'll post when I have a good solution for tracking either individual adds or custom URLs in AdSense using Blogger.