I’ve been using a new ad system called Peel Away Ads. You can see a great example on this site. Notice the ad in the upper right corner? I have found these work fairly well and are not obtrusive like pop ups. I have found this product to be very useful and you can easily add ads to all your sites with as little as 1 line of code. So, it could be very easy to promote a new product or service across all your websites. I give Peel Away Ads an excellent rating.