Admittedly, I use launchpad sequences for mounting _and_ unmounting. It's a pretty manual approach. But mounting ZIPs is probably worth another thread, I did not want to drive this one away from its topic. My intention was to point to a use-case for using Go, and there might be numerous others.
E.g. the web server (and client!) framework that Go offers in its standard library is probably worth a mention. On the other hand, when it comes to UI stuff, Go comes pretty unprepared, especially with regard to the Kindle. In kindlepdfviewer, I started UI stuff from scratch (and others gladly helped a lot, so we have some pretty decent framework already). It's possible and it works, and replicating such a thing in Go would certainly be feasible, though some amount of work. But writing a UI framework probably is not something to start with when learning a new language like Go. Go really shines at the more bare-bone aspects, and I would be interested in what other people might use it for.