Since I'm reading a lot about the Adventurer, Conqueror, King System (ACKS) lately, here are some links for later reference.
The ACKS Forums
Jeffro Johnson's A Few Observations About the Adventurer Conqueror King System
Gaming Monk Review #16.
Aeons and Augauries review (R2).
Guest Review (R3) at Tenkar's Tavern.
19th Level review (R4).
A podcast interview (P1) with Alexander Macris.