I'm still running Chitika eMinimalls as an alternate to AdSense. I'm not talking instead of AdSense, but as the alternate page when AdSense has no matching ads and would normally display a PSA or glorified whiteness. Unfortunately, the same Chitika ads that had a post-audit CPM of $0.50 last October are now giving me a pre-audit CPM of $0.04. I've been playing with lots of other alternatives, but almost every alternative is either not allowed by AdSense (ExpoActive), simply doesn't work well as an alternative (AdBrite, AdGenta), pays nothing (Chitika) or I can't get approval (YPN, iM Canadian). Suggestions? I get about 25k alts per day.
Your adsense income is low, or not producing enough for you... get it off your site! Then you can use whatever contextual progam you wish. Alternately, find a good affliate program and use that url in adsense.
Apply to be in the Beta of YPN. They don't have enough advertisers to be completely contextual yet, but they normally have reasonably close ads.