I work for Braintree -- we've been playing around with Go internally in the last two months, but no production system uses it yet.
The language itself is pretty cool, but most of our work is still web application development (broadly defined). Go isn't particularly suited for that, and even if it were, it doesn't have a mature framework for doing webdev yet.
> The language itself is pretty cool, but most of our work is still web application development (broadly defined). Go isn't particularly suited for that, and even if it were, it doesn't have a mature framework for doing webdev yet.
Really? Web development is one of Go's strengths IMO, and the standard library was clearly designed with web development in mind. i.e., the HTML template library, the net/http library, etc.
There are also a few third party frameworks out there. They may or may not be mature depending upon your definition, but gorilla looks promising.
The language itself is pretty cool, but most of our work is still web application development (broadly defined). Go isn't particularly suited for that, and even if it were, it doesn't have a mature framework for doing webdev yet.