Several hours ago Peter from Nikon Rumors has posted that Nikon is going to announce the V3 around midnight EST/early morning GMT. Now Andrew Reid from eoshd.com has posted a short article with images and video specs of the V3 ahead of the supposed announcement. It reads as follows:
The Nikon V3 will be the first mirrorless camera to feature 120fps HD slow-mo at 1280 x 720 resolution. Also available are 400fps and 1200fps at lower resolutions. Nikon have added an electronic stabilisation mode (called EVR) and 1080/60p to round out the spec.
This is what the Nikon 1 V3 looks like. 