Three codes were hidden in the THE UNWITTING post on the Investigate Ingress blog.
[1] vrcptqtdfmdeclepesehehsh
[2] vm66aomg3oi53cm
[3] nnmvlmlldvdwnmlvmnxmwvlmnwlvbdvwlvwllwnwmylwlm
Code #1
Observations
Go through your usual cipher routine, a simple one
Code #2
Observations
15 characters with the right amount of numbers for a valid passcode
Code #3
Observations
Those letters fall in a very specific range