New release v0.0.2 available now on Homebrew or the Github releases page. This version adds the --macaddr (or -a) argument so that you can specify the virtual machine ethernet adapter's MAC address. Without this flag present, the MAC address will be assigned randomly on every boot, which can make network operation troublesome.
I released version 0.0.1, and the tool is now available on Homebrew.
I intend to, over the course of the next few days, add a few subcommands to help with downloading distributions, and perhaps a friendly mode that will run Ubuntu/Fedora/etc. on demand. I've also considered adding a daemon mode that you can connect to.
If anyone has any feature requests, please feel free to file them as an issue. The Goals wiki page contains some of my thoughts around the project and where I intend to go with it.
(This blog article was compiled from comments on Issue #2)