Hi again!
We publish the videos in some spanish developers forums (eltrolado,mediavida,peninsulaindie) and the subtitles starts with a "Subtitles realized by GloveCat". we'll also publish the videos on all social networks: Facebook, twitter...
Anyway, I personally don't do this because the advertising. I believe in Spine at 100% and i'm in part indebted to you, we acquire the license in the KickStarter and currently i think Spine is priceless, and 55$ for 2 license is too cheap!!
About the HangOut, I would love to participate BUT I don't have enough level of english for that, I understand perfectly the english but I can't talk it fluidly. In GloveCat, The english translations are made with the "hive mind" workflow... One of us translates his idea and then, all of us check the translation and fix the mistakes.
When you do a "mude Hangout" i will be the first in the list!!