Adbrite is a great way to monetize or advertise your website. The program is similar to Google adsense except AdBrite doesn't ban publishers indiscriminitely like Google Adsense does, so yuor earnings are safer in this program than Adsense. We average about $30-$100 per month in revenues from AdBrite per month and are always paid on time.
AdBrite - The Internet's Ad Marketplace
btw, they are also a cheaper alternative to Google Adwords, great rates and good advertising.