Thanks so much Lisa and charcoalandpencil for your wisdom, advice, and encouragement.
That is very interesting charcoalandpencil about having an increase in click-thru's when you converted your ads to rectangles. I have heard from other bloggers and webmasters that you have more click-thru's if the ads blend in with your web site/blog and are located within articles and posts.
Thanks again Lisa and charcoalandpencil for taking the time and energy to reply to my post. Have a great weekend!
Chris H.