Right now docker cannot be installed on Ubuntu without doing one of:

1. installing backported 3.8.X kernel into 12.04 then using the PPA to install docker.
2. building from source (or pulling http://get.docker.io/builds/Linux/x86_64/docker-latest.tgz ) not using the ubuntu packaging setup, and installing manually (not dpkg) on 13.04.

It would be really nice to be able to install from the PPA onto 13.04, built with a version of Go which avoids the "closed network connection" issue.