Here are two good posts related to website monetization.

Making Money In the Mashup Economy – An interesting post over at GigaOm about how some companies are monetizing all of the mashups that you see springing up all over the place. One key take away is that many of the people selling tools and services related to mashups are the ones making money. However, there is a great example of hypemachine which allows users to sample music. They monetize the site via links to the apple itunes affiliate program and advertising sales. I could also see them selling feature spots on the homepage to push certain artists. This might be a bit shady, but it could be a nice way to make some money and the payment could be disclosed.

Ringtones Experiment – BlueBobbo got tired of reading in all of the forums that the ringtone market is saturated, so he decided to run a test PPC advertising campaign. The results were surprisingly positive. I love test like this which dispel common myths. It just goes to emphasize that you would always be testing.