I have recommended before the key books I have used and am still using to get an overview of Christian history, and theology.
I've been talking with the Author of one of my favourites, Alister McGrath's 'Christian Theology: An Introduction', about podcasting the book as a series for people to listen to, and Dr McGrath has agreed to be involved. In practice it will mean turning the book into a series of podcasts/mp3 downloads. I'm hoping Dr McGrath will undertake some of those, and that we'll have discussion forums linked to each chapter, that he will participate in.
And my biggest hope of all is that is will be a resource, for many to listen to, and it will be a great way to get an overview of christian history and thought.