Hi all, the day is finally here. 
First of all, please be aware that this is a beta pre-release, things may be rough around the edges and there may be cross-platform issues, etc. The version 0.0.3 beta releases (for Windows and Linux) can be found here: https://github.com/badcodeltd/safecms/releases/tag/0.0.3.
Linux has had a lot less testing than Windows, so please consider it less stable, but I’m free for the next 24 hours to make any hot-fix builds needed and I’ll push a 0.0.4 release for Linux users if there are any major breaking bugs.
Installation instructions can be found here on the Github page: https://github.com/badcodeltd/safecms, though they’re essentially “run the safe-cms executable after unzipping the directory”.
In addition, this also means that the code for the app is now open-source, so you can all have a good laugh at how bad it is. 
The code is released under an MIT license, so feel free to re-use any part of it.
A true 1.0.0 release should be within the coming 72 hours, including the MacOS build (and, if the electron-builder gods are friendly to us, NSIS installers for Windows and DMG installers for MacOS), but this beta release allows us to find anything weird, funky, nasty, etc.
On a personal note, I’m really nervous right now, there’s something oddly private about revealing a big chunk of code you’ve written from scratch to the world like this, but I’m also really excited - not only did I manage to build the thing I said I would, but it has more features than expected and it’s being delivered early.
If you’re specifically interested in the code I wrote (and much I borrowed from the safe-examples) to interface with the SAFE Network, that can be found here: https://github.com/badcodeltd/safecms/tree/master/src/safe
Long live the SAFE Network.
Edit
If you build something using the network, please post it here, I would really love to see what people make with the tool.
Edit 2
Updated release number to 0.0.3