For the past couple of months, I've been running Text Link Ads on my site cwire.org. So far, with their affiliate program and the ads that they're inserting on my site, I'm making between $400 and $600 per month. This month is looking like it might peak above $700. I'd highly recommend checking them out as an alternative or even as a compliment to AdSense. Their support is awesome and so far I've made a good chunk of change from them too. Check out my review for more info if you're interested... http://www.cwire.org/2006/05/04/text-link-ads-the-best-alternative-to-googles-adsense/