Another couple of links which you may find interesting are...
Towards More Realistic Pathfinding - http://www.gamasutra.com/features/20.../pinter_01.htm
Polygon Soup for the Programmers Soul: 3D Pathfinding - http://www.gamasutra.com/features/20020405/smith_01.htm
Actually every single game developer on the planet ( maybe even this solar system ) should be a member of the gamasutra ( http://www.gamasutra.com/ ) site
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