The Download Center from Samsung already had the NX20 and NX200 in the database since weeks! But finally a trusted source told us when we will see the new Samsung camera for real! We expect Samsung to announce them between July 11 and 17! Both cameras should feature the new 18 megapixel sensor. We got a few tidbits about the NX200. It should have 1080i60 recording but without full manual control (much like Panasonic G3).
P.S: Some new sources told to me the NX20 could be announced later (take that with a grain of salt).