Squidoo - as pointed out by Paul you don't need your own AdSense code you use Squidoo's to earn.Thanks Paul!
http://www.squidoo.com/squidoo.
Hubpages - Hubpages get more traffic from search engines and for sure you could make good income from this site. You can integrate your Adsense account into hubpages. http://hubpages.com/tour/hubpages/
SoftwareJudge.com - write reviews of select software products.
epinions.com - can pay cash for good quality reviews.
Pickydomains.com - write site descriptions and suggest domain names.
Xomba.com - write anything you feel like, and collect 50% of any advertising income from Adsense clicks on your page.
examiner.com - if you want to be a journalist you can start by being an examiner.
Flixya - A good site to share everything from writing articles, sharing videos and images. The best thing is that you will be paid 100% revenue that you make out of your pages or videos or images.
Bukisa – A site to share your knowledge and earn money for that based on the traffic you gained. Publish articles on Bukisa, drive traffic and get earn money for every 1000 hits your page makes. You will be paid a fixed amount for every 1000 hits and more traffic you generate, you will earn more money.
Other writing sites include associatedcontent.com, firehow.com, and helium.com
