The New AI in OpenTTD is DEAD. It is no longer on active development. If you want to pick it up again, feel free and have a look at AI:Main_Page. Note, however, that NoAI branch is active, and is developing new OpenTTD AIs using Squirrel.
This information pertains to work done on the now-depreciated 'New AI', which has largely been replaced by 'NoAI' for the purpose of ongoing development.
New AI plans:
- New AI / Airport Airport
- New AI / Trains Trains .... what about trains?