The menu's been reworked too, and Steam achievements have been added. It adds a number of new features and bug fixes, including the ability to script in-game NPCs and play as all the civilian models in the game. Version 0.2 is now in public Beta, and you can opt in to play by heading to the Betas tab in your Steam library.
The excellent Just Cause 2: Multiplayer Mod has received a new update.