I can't seem to find any... it's a bit sad for a language positioned as networking-oriented one.
After sometime in exp/ssh, the official ssh package now resides in the crypto/ssh subrepo: http://code.google.com/p/go/source/browse?repo=crypto#hg%2Fssh
I know Caspar has already posted the link contained, but here is the list of community contributed packages:
http://godashboard.appspot.com/package
For completeness here are the official packages:
Also, since it is a VERY new language I don't feel too bad in saying, if it needs doing, I'm sure they would be happy for your contributions. (I try not to say "submit a patch" when we are talk about old languages/modules, however a new language is an exception)