TD, it does indeed seem like it can be done in a fashion and the link in Mobius's post gives a good overview....but the soggy, sorry-looking clump of stuff that comes out at the end ain't bread as I know it!
I like my crusts crunchy!!
From RFC 1925: "(3) With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead."