Smowtion is a good one I guess! I have tried it but the payout is not that much as google adsense, but still better than a lot other other ad networks!
what about media.net ? I'm still waiting to read good things about the "adsense-killer" bullshit from yahoo/bing/media.net No news = good news? Not sure in the case of media.net..
I've known alot of websites and i can tell you that there are many alternatives for this thing. You can check this list. Bidvertiser Chitika Infolinks Intellilinks Dynamic Oxygen B4PSAds.com Clicksor Skimlinks Exit Junction Kontera HAPPY EARNINGS people.
I have been using media.net for one day. I got over $50 for a slot lower on the page than an ad that gets me $3 a day on adsense. I am utterly boggled and either that is a fluke, or that really is how it works. One day is not a pattern though, but it was enough to make me swap the order of the two ads.
Nothing in this world could be a better alternative for adsense. so where ever from you are no matter.. Adsense is better!!
I've tried a few different ones but tbh adsense has paid the best for me (although not the same for everyone).. I even went down the whole affiliate links instead but that failed .. stuck with adsense until one of the other big boys get in the game