SonyAlphaRumors and Photoclubalpha, both got confirmation from their sources that the NEX-FF is going to announced soon (in October). The first camera will cost around $3000. There will be also a "cheaper" camera coming a couple of months later. Both cameras feature the same sensor and both are very NEX-7 alike (but they will NOT replace the NEX-7). The camera has an E-mount and current lenses will work in crop mode.
At start there will be two zooms, a 35mm f/2.8 Zeiss and a 55mm f/1.8 Zeiss. There is also a rumor about a 85mm f/1.8 Zeiss but it's unconfirmed yet.
Overall it looks like Sony pushed very hard on the accelerator to be the first company (after Leica) launching a full frame compact camera with interchangeable lenses. Sounds like the RX1 success convinced them to put all their resources and knowledge on a sort of interchangeable mount version. Sounds great!