NPC corporations have gained more assignments, and there are six levels of security associated with them -- improved, naturally, by successfully completing more assignments for said corporation. They're now offering unique ammunition as a reward, which cannot be reverse-engineered. Prototypes have been improved, with the advantage that they now can have a slight edge over "normal" versions and are that much easier to reverse-engineer. Best of all for new players, the first stages of the game's tutorial have been added. While Perpetuum isn't yet in open beta, the team seems confident it won't be too much longer before everyone can try out the latest improvements.
[Thanks to GM Gremrod for the tip!]