I\'ve been reading things here and there for a while now about using an \"ant colony\" model as a heuristic approach to optimizing various types of algorithms. However, I have
I am surprised nobody has mentioned the bible of ACO:
Marco Dorigo & Thomas Stützle: Ant Colony Optimization
This book is written by the author of ACO and it is highly readable. You can take it to the beach and have fun reading it. But it is also the most complete resource of all, great as a reference when implementing the thing.
You can read some excerpts on Google Books
Another great source of wisdom is the ACO Homepage