Yes, and we even went through one of the books Flew cited in support and discussed it at length on MindWalk's forum (David Conway’s argument for God’s existence in his book The Recovery of Wisdom: From Here to Antiquity in Quest of Sophia). I believe we also discussed Richard Swinburne's book The Existence of God, too, although not as extensively.
I believe we ended up agreeing to disagree.
I remember questioning what Flew meant by 'God' some time ago now and challenging some of his assertions. I don't remember there being much if any 'discussion' about it.