Well, it has certainly been a lot longer since I wrote a post than I thought.
My work at Canonical still has me on the Juju team. Juju has come a long way in the last few years, and we are on the final push for the 2.0 version. This was initially intended to come out with the Xenial release, but unfortunately was not ready. Xenial has 2.0-beta4 right now, soon to be beta 6. Hoping that real soon now we'll step through the release candidates to a final release. This will be SRU'ed into both Xenial and Trusty.
I plan to do some more detailed posts on some of the Go utility libraries that have come out of the Juju work. In particular, talking again about loggo which I moved under the "github.com/juju" banner, and the errors package.
Recent work has had me look at the database agnostic model representations for migrating models from one controller to another, and also at gomaasapi - the Go library for talking with MAAS. Perhaps more on that later.