I'm still a newbie when it comes to this stuff, but why can't someone build a M43 adapter with autofocus in the adapter? Say you set your lens to infinity focus, tell the adapter the focal length, and let the sensor and adapter do the rest. I guess this would only work with fixed element lenses, as it wouldn't be able to control focus on a moving element, and zooms may be a problem. But if I have a fixed focal length lens, with fixed elements, why can't an adapter do the rest? Using it with aperture priority would make it almost as useful as a native lens. The drawbacks would be size, it would have to be big to hold the mechanism, and cost I'm sure. Would it be worth $400 to use a lens that cost $50 on eBay? If the fixed adapters cost $200 (not the cheap ones, which are ~20) a fully functioning one would easily be twice that. 35mm lenses already overwhelm an E-PM1 with their size, what's another few millimeters?