This is a little long but has some good nuggets on Abraham/Esther Hicks' interpretation of OBEs. (Skip ahead to 4 or 7 minutes if you don't want to hear the woman's long-winded question.)
In particular I like her interpretation that OBEs are us releasing enough resistance that we're able to consciously join our higher self and feel the joy of being the whole of who we really are from a broader perspective. I don't think I've ever felt such exhilaration in waking life as I do in some OBEs so this makes sense to me.
Also interesting is that we can't usually re-create peak OBEs because those experiences are answers to questions or desires we had at the time however we can remember how to "focus and allow/release resistance" that created that experience to feel the joy of it again (not unlike peak meditation experiences).
http://www.youtube.com/watch?v=f_7f5THVL-4&feature=related