Go1.7 beta is out now and would be awesome to support it (I think a lot of people will be upgrading quickly due to the performance and compiling improvements)

Not a huge hurry yet, just thought I would put in the ticket early :)

I started poking around and I think that changing runtime.go will fix half the issues

-const GOOS = sys.TheGoos
+const GOOS = sys.GOOS

And the other issue I don't fully understand (when trying to do a gopherjs build):

$GOROOT/src/runtime/error.go:70:9: invalid operation: e._type (variable of type *struct{_string *string}) has no field or method string