The arguing over the validity of this idea in this thread cracks me up, I just hope the OP doesn't decide not to share their results due to the arguing from people who clearly have no idea what they are talking about! To the nay sayers: go come up with something innovative.

If direct die cooling was a bad idea than no one would ever remove the IHS to cool it, all that achieves is the removal of a couple layers of material to transfer heat through.