Sony Japan publish a statement confirming Amazon’s product listing note that the NEX-7, NEX-5N, NEX-C3 and a65 cameras will be postponed. It’s interesting to note that the a77 was not listed as delayed. No firm release dates were given:

The new firmware for the A65 and A77 SLT cameras will probably be released in mid-October, 2011. Firmware version 1.03 was already spotted in a recent Sony event in Thailand (see picture above). Sony claimed that the NEX-5N clicking sound during video recording is caused by a mechanical part of the shutter that “clicks” during sudden movements [...]
The first Sony NEX-5N unboxing video is already out: According to the Sony Store the camera should start shipping on August 31st, 2011. B&H is also accepting pre-orders, which is also a sign of an incoming shipment.
Sony announced all of the previously rumored products. Additional coverage: Sony official press releases Sony SLT-A77 hands-on preview at dpreview Sony NEX-7 at Engadget Sony-5N at Engadget Sony a77 at Engadget S0ny a77 at Luminous-landscape Quick Review: Sony NEX 5N (And Comparison to the C3 and Olympus EP3) Pre-order option The new Sony NEX camera [...]
Some additional specs for the Sony NEX-5N mirrorless camera: 0.02 seconds shutter lag time 3 in. 921k dots touch screen LCD AF tracking can be enabled from the touchscreen Improved audio quality during video recording New OLED viewfinder with eye proximity sensor (similar to the Fuji X100) will be available as an accessory.