Depending on your blog niche, you could try amazon affiliate links. One of my blogs is doing pretty well with those, earning more than I had been with AdSense.
What is cpxinteractive.com? How do I get CPA offers? @sanchez - Don't you only make money when someone buys something?
Kontera is dying. HubPages is probably one of their bigger customers and they are moving away from Kontera. I have heard that Infolink is at the top for that type of advertising. Have you tried Yahoo or Bing's ad networks?
i think adbrite is a pain in the butt if anyones done good on it please let me know its a shame widgetbucks closed down now they were sweet
Mediashakers.com - 1/5 cents per click, pays with paypal Infolinks - around 1 cent per click (has high click rate)
As some people say there's no adsense alternatives, there are only inferior alternatives. Remember that google is a billionaire company, so is extremelly hard for some other company be competitive against google. I use adhitz for one of my sites and I usually get 2-4 cents per click. They pay up to 9 cents per click when the click is originated in countries like USA and CA.
True as more and more companies are created and start advertising using adsense the more each company will have to bid for that ad as time goes bye your earnings will increase if you want more earnings consider making content focused around expensive topics like expensive cars, the stock market or computers etc. a wallpaper site for example wouldnt make that much per click (i would know)
Actually, there is no best alternative to Google Adsense. However, if your main traffic source is search engines, Chitika should work best for you. Again, if you're recieving lot of page views per month, buysellads will work best for you. Good Luck