Sony has made available a firmware update for the NEX-3 and NEX-5 cameras on the Sony support site (http://esupport.sony.com/).
The camera firmware provides the following benefits:
1) Adds 3D Sweep Panorama function
2) Improves the Sweep Panorama function by enhancing the accuracy of the stitching in cases where sky or sea occupy a large part of the scene
3) Reduces power consumption when the camera is off
4) Reduces start-up time under low-light conditions