Retooling the I/O manager isn't a huge job, but it requires the equivalent of several weeks of work. I tossed out my initial attempt at a patch because I didn't have time to work on it, so I'm back to square one. Johan Tibell and I have had occasional discussions about picking up the thread again, but we've had a busy year and it's moderately demanding work, so nothing has actually happened.

If I develop the time and energy to take a serious crack at it, I will post here to let people know. This would be an effort where having multiple people work on different implementations concurrently would be a shame.