I wanted to do this in a blog post but yeah we've been silent for too long, so in short this is how things are now:
I'm sorry to say that Perpetuum is not actively developed anymore, but you probably noticed that.
Me and Gargaj officially left the company a while ago and Avatar Creations (the development company) is not worth to keep for the remaining developers. So yes, Avatar Creations is being shut down.
That said, the game is and has always been published and run by its sister company, Gamestorm Ltd., which is still alive. Thus, Steam distribution and running the server are not affected by the closure of Avatar Creations.
Nevertheless, we didn't want the game just simply die and fade into nothingness, so in our free time all of us have been working on a standalone server for Perpetuum that you can run on your own. Most of the work is done and it will be ready for testing soon.
The official server will still be around for an undetermined time, but since we won't be able to control the standalone servers, the game will practically become DRM-free.
Once the standalone server is ready I will do a more detailed blog post about it.
tl;dr - Perpetuum is not shutting down, but is not being actively developed.