Three codes were hidden in the HTML source of the A DISPARAGING RUMOR post on the Investigate Ingress blog.
[1] 1djr5oypjeds3b5d
[2] 3hkp8rfzqviz0h8q
[3] 3tyg2viqczry0d4k
Code #1, #2 & #3
Observations
All three codes have the same length so we can assume they work together. One is basically the key for the other one