Luke Muehlhauser, over at Common Sense Atheism and I are creating a series of podcasts to describe Desirism (a.k.a. Desire Utilitarianism) from the ground up.
You can find a link to a podcast index and access to the podcasts at Morality in the Real World
Morality in the Real World is a series of dialogues about what kinds of moral value do and do not exist in the natural world, how we can examine these issues carefully, and how we can (really) make the world a better place.
This is actually the project that I wanted to do for a long time - to describe desirism from the ground up in detail. And - truth be told - is a project that I would have never been able to do without the significant efforts of somebody like Luke providing a level of quality control and discipline I have seemed to be lacking.