Thomas Adams of "Without Authority" has a rousing defense of the Lutheran doctrine of ubiquity. It doesn't change the fact that if we accept ubiquity, Christ's body and blood are really present in the grilled cheese sandwich on my plate, and not just in the bread and wine on the altars of the world; but the post makes some important points that tend to be overlooked in the discussion.
Speaking of which he has a good post on Johann Hamann. You can read more about Hamann at the SEP and at the IEP. Hamann is an interesting philosophical figure in part because he is a Christian Humean, at least a Christian Humean of sorts -- he calls Hume 'his philosopher' and unleashes him against Kant, to poke holes in the pretensions of the Enlightenment thinkers. And he takes the Humean account of the mind and transforms it into a theology of language. Which is perhaps a fitting twist, given that Hume's philosophy is in part a transformation of Malebranche's Christian-rationalist attack on idolatry into a skeptical-naturalist view of the world.
Manalive, I love the history of philosophy. You couldn't make this sort of thing up if you tried.