I received some information that the Samsung NX20 was delayed because if its EFV and the recent Sony NEX-7 announcement. The initial plans were both NX cameras to be introduced this summer. It seems that Samsung engineers wanted to do some final adjustments to the NX20 EVF before the official release. The camera will soon be in production. Announcement is expected in the next few months.
The previous Samsung NX10 model is no longer available for sale.