You just add the domains in adsense for domains, then it gives you the a and c name for you to update the domain, which would point it to the adsense server. Once this is done and verified (about 30 minutes) your domain will now be a google ad landing page full of links. The ads are based off of your domain name, but you can also add 4 more keywords to each domain. I made about $20 in the first 2 or 3 hours of setting it up with my keyword domain name, which was more than I made in about 5-6 months with regular adsense. I'm sure a lot of that had to do with the adsense having low paying ads on the other sites, but whatever. I was last paid 12/1/07 for regular adsense. I am up to $96.60 since then. With domains, since 4/13/09 I've made $947, about $52 a day.