Re: Diablo 3 Modability
No Kiroptus, he means that the folder structure should be divided with single player only in mind so you don't alter the b-net files. Hate to sound like a goat here but ney, can't see this happening, I'm a fan of it myself as I too spent ages modding my own doom3/quake4 .pak files to make weapons behave the way I wanted. However that said someone will find a way, they always do except it'll probably still be very messy. I hate the way diablo2 is modded, wouldn't touch it with a ten foot pole-got better things to do.
edit: although they did say that there would be scripted parts in the game. Maybe this could be indicative of .script like files? This could work.