Ok - to balance my post on history of doubt, here is a link to a recent NOVA episode Bible's Buried Secrets. Now, I'm a sucker for history in general, but I think NOVA did a fantastic job dealing with a delicate subject and also of highlighting research methodologies in history and archaeology. Yes, it got a bit syrupy towards the end (it was expected), but there are places where their presentation is riveting. If you don't have the time to watch the whole two hours, check out the beginning, the sections on The Exodus (I think this is very well done), the Canaanite Cities, and The Search for YHWH. Below is a clip that includes the discussion of YHWH.