Hi I think u have implemented some of the changes with 336X280 ads right. Try using blue text links as it is the best color layout and also remove the borders for the 1st ad on the left. You can check my sig for the best layout and color and ad blocks I used.I have tested so far for my sites for 3 months period and with advises from all the IM friends on the net. I am averaging 15-20 per day with about 200UV for all my sites. Hope this helps
That is really a nice earning,try to get more traffic for your site. By the way,i just opened your site,but i did not found your google ads.I really want to know which keywords did you chosed.