See this stackoverflow q/a -- it appears to contain most of the current highlights. Basically Ubuntu has started packaging a few go apps, and fpm[f] seems to be an ok alternative in the meanwhile:
http://stackoverflow.com/questions/15104089/packaging-golang...
packager.io (which upstream googs uses) seems to be a nice way to just get packages out there, but as far as I can tell it's pretty well walled-off behind a service, so no easy way to build locally, off-line, or without using packager.io etc. In that sense it strikes me as a poor choice for Free software, as there is no promise that things will continue to work, or can be made to work, long term.
[f] https://github.com/jordansissel/fpm