The well known german website photozone tested the Panasonic 25mm f/1.4 Four Thirds Lens
Read the review: http://www.photozone.de/olympus–four-thirds-lens-tests/509-leica25f14
Check out the lens on Amazon
Message to Panasonic: Make a MicroFourThirds version of that lens and I bet that many of our readers will buy it!