Last week we released BAT - our Bookings and Availability Management toolkit as well as a Drupal module for BAT. We are using BAT to build the new version of our Rooms module as well as other products. However, BAT is much more than an engine for nightly bookings. It also allows us to build any sort of booking / resource management tool. So we asked: "What would it take to build a resource management tool to manage ourselves?".