The closed beta starts today with limited promotion. If you happen to be part of the first set of users, welcome on board! Please join the Discord server, and post whatever observation you have about the platform. Luftrum is admittedly limited in scope, and for the first slice, stability and usability will be the primary concerns. That said, all ideas are welcome, whatever bugs you, let me know.
Those already onboarded will enjoy priority when it comes to additional invites. If you have a friend or flight-buddy, let me know on Discord and we'll send them an invite in the next round before any external promotion.