Some rumors point to an April 18th announcement of the new Sony EVIL cameras:
"18 april is the press-release of this camera, the camera shall be different , than we see at the PMA and maybe we get some more information , about some other thinks but that I don't now for sure"
Others rumors indicate an official release in late May:
"According to our sources the camera will be announced on late May! We don’t have the exact date but we have been told that the camera will be available in stores in June. There will be two mirrorless cameras called NEX!"
The detailed specs are expected to be: