Mine happened this morning - 2012 Civic Si, this is maybe the 5th or 6th time in 11 months of ownership. Works exactly as others have stated, get in turn key, nothing - no click or anything, like the clutch is not pushed in. Otherwise, the car has power, lights, radio etc are all fine. Turn off the key and try again and car typically works 2nd try, occasionally it takes a 3rd try. A bit disconcerting but seems to always work with a few tries, so doesn't appear to be ready to leave me stranded.
Definitely sounds like there is some type of a common defect here, but it happens so infrequently that the dealer will never be able to diagnose and repair unless it starts to happen regularly.
Rob