[ndvr]

We have learned, that a lot of different people, of different age, sex, jobs, skin color, language and countries can join together to solve puzzles.
(at least I)

when you have it

what have you learned? how did you find it?

Is he speaking of same things? If same, I would thought of OWI's "Braille Monday" image.
If not, I think that "how did you find it" is how you guys found his Twitter.

EDIT: Perhaps he speaking of ciphering methods? We learnt his pattern of using Caesar cipher and hiding images and audio/video files, but that's rather common ARG method...