@ DarthEnder: If chapters really did map perfectly to episodes then you could mathematically create a simple rate monotonic schedule and insert a filler arc of some constant length everytime the manga and anime overlapped, unfortunately the number of chapters per episode is far from constant, and if you wanted to just assume the worst case then you'd probably get a requirement of year long filler arcs every so so often.

By my estimates there's only about a one season's worth of stuff in the manga at the moment, and that's allowing for a decent bit of milking. I doubt we'll see a non filler episode before the current manga arc ends, which should take 15+ chapters at a rushed minimum. So...sucks to be us.