I think Go does good work at concurrency support, so using it can save me a lot time dealing with concurrency.

And in my opinion Go is simple to learn, which can make others contributing it more easily. For example, this is only my second Go project, and most of Goby contributors haven't written any Go code before (of course I spent some time guiding them).

The last reason is that I think Go has a relatively big community and ecosystem. It'll be more easy for me to finding resources.