For anyone who wants to hack with Go tonight, here are some installation suggestions:
Go can be installed in a few different ways. You can install using a package manager or using the Google provided binaries. I prefer to use Go Version Manager which is similar to rvm and nvm. gvm can be installed by following the instructions here
Once gvm is installed it is trivial to install different versions of Go as well as install the cross compilers.
To install Go 1.4.2 (current) simply run:
gvm install go1.4.2