02-27-2007, 12:56 PM
I would have to say adwords. In my opinion it is a little more reputable and business has been booming for quite some time. They also offer alot of training and support if you are new to the system. It seems to be talked about, more, on forums, too. This makes it easy for new comers to understand. Many people post many successes about adwords. To be honest, I do not hear too much about yahoo's system.