In Japan the Panasonic 20mm f/1.7 II lens has been marked as discontinued (Source Asobinet). This is one of the most important lenses in the MFT history. The first generation lens was announced back in 2009 and proved to be a hot seller. Now with Panasonic stopping the production you should think about getting it before it runs out of Stock at BHphoto, Amazon, Adorama, Fotokoch, FotoErhardt, Calumet, Clifton.
I don’t think Panasonic will release a new version, and this is a sad news :(