SLRgear published their Panasonic 14mm f/2.5 test. The lens is very sharp, Chromatic Aberration is somewhat high for this lens, Vignetting and Distortion are negligible. And their conclusion is very short: “With sharp results and only slight issues with CA, Panasonic has produced a very nice walk-around lens “. Read the full review (with image samples and graphs) at SLRgear.
M43photo.blogspot compared the Panasonic 20mm with the new 14mm lens.
Check the price and availabiltiy of the lens:
USA: Amazon, Adorama, BHphoto, eBay
Germany: Amazon.de, Pixmania.de, eBay.de
France: Amazon.fr, Pixmania.fr, eBay.fr
UK: Amazon.uk, Pixmania.uk, eBay.uk