You can also do Java + Play. And Go's out there now, and it comes with most of the stuff you get from Play out of the box (and for the other stuff, getting it is easy enough).
Which part? The coming with most of what you get from Play? Look at Go's template/html and net/http.
If you don't like those, pango2 aims to provide django-esque templates for go; things like martini, gin-gonic, and negroki provide nicer routers; and Gorilla aims to provide a good deal of web-server-y things.
