Here are some essential and some interesting links regarding Diplomacy and AI.
My web page... where you can find all the info you need.
Wikipedia - Diplomacy Game
Diplomacy Rules - A compilation of rule books
Diplomacy Guide - This guide by Richard Sharp is helpful for learning the game
DAIDE - DAIDE Main Site
DipAI - DAIDE forum for discussion of Artificial Intelligence
RTNow - Real Time Diplomacy Community - Organizing the creation of games
RTDip - Real Time Diplomacy Community - General discussion
David Norman's Site - Location of Aimapper and Aiserver
John Newbury's Site - Artificial Intelligence discussion and some documented AI tournaments
Diplomacy Archive - Great Resource of Strategy Articles, especially those by Stephan Agar.
Diplomacy Pouch - Online Zine
Geography is Destiny - Strategy review by Paul Windsor
Geography is Destiny Revisited - A second look at the concept by Ole R Tuft