Three codes were hidden in the HTML source of the A MOMENT OF CONNECTION post on the Investigate Ingress blog.
[1] 21nknxu580tx534513
[2] uy268q83fjl1f7qc31pj2f9lzqzm
[3] 12k050216kl241904l0521l2416jh24
Code #1
Observations
Some numbers are not numbers
Code #2
Observations
A long string with no particular range should hint you on the first step
Code #3
Observations
Numbers work in pair. In the end there is something missing to make the magic work