The new Panasonic-Leica 12-60mm lens is in Stock for the first time in Europe via Amazon.de. It will ship next month at Amazon, BHphoto, Adorama, Amazon.co.uk, Amazon.fr.
ePhotozine posted the full lens review and concludes:
A standard zoom is a very useful lens and one that offers a high level of performance even more so. The Leica DG Vario-Elmarit 12-60mm f/2.8-4 Asph is a remarkably fine lens and despite the higher price that it demands gives excellent VFM. Definitely this is a very strong contender if looking for a versatile all purpose Micro Four Thirds zoom.