I have, finally, found the product that may help me make the jump to a Micro Four Thirds camera, the Vizelex Light Cannon from Fotodiox. Note, this is not the first of its kind. The Speed Booster, whose Leica R to MFT adapter is shipping, and the forthcoming Lens Turbo, are early competitors in the field. The Light Canon offers a 0.72x focal length conversion and a 1-stop increase. This adapter is made to convert Nikon D (e.g. Nikon 24mm 2.8D) and G (e.g. Nikon 35mm f1.8 G) lenses to MFT with additional focusing optics. This enables you to use Nikon lenses on a MFT camera without loosing your field of view. A 50mm stays a 50mm lens equivalent. With these adapters you can shoot with manual mode or aperture priority and they say infinity focusing is guaranteed.
This adapter will be priced around $159.95
Correction: we stated that a 50mm lens stays a 50mm-equivalent when used on Micro Four Thirds with this adapter. Of course, since the focal length reduction is 0.72x and Micro Four Thirds has a 2x crop factor, a 50mm will behave like a 72mm lens. We apologize for the mistake.