If you offer advertising (or want to) on your business website or blogs, you may have been holding off because of the cost of using online ad management systems. Sure, there are “free” ad networks, but most of those don’t allow you full control over the ads that show up on your site. Google’s Ad Manager allows you to sell ads, but also to supplement those ads with ads from Google AdSense and other ad networks. TechCrunch has more information: Google Will Now Manage Your Website’s Ads, as well as Ad Operations Online: Google Ad Manager out of Beta; All AdSense Publishers Can Use It.