For what it's worth -- this industry and community, unlike any other is one in which I've most seen people willing to give world-class advice, thoughts and help for free. Maybe it's the communal roots of open source culture, not sure... but it's rare and amazing. So I am also thankful.
Keep it going! A lot of times we keep positive feedback for ourselves, or close friends, but we don't share it back online.
It means a lot about you as a person that you think of posting this back to HN. You must be a pleasure to work with! I'm sure you will enjoy your time in São Paulo!
To be sure, this sentiment is being pushed out of the industry by people with little interest in those communal roots.