So just where do you get all your textures? It seems every map I see from you has amazing texture-work that takes it above and beyond the level of a 'normal 'map. Bravo!
And I must agree: Smart Layers (and their cousins, Smart Filters, if you have CS3+) are probably two of Photoshop's most genius moves, yet. I think I've basically decided that they're almost as big as layer-based editing in the first place, though I haven't wholly decided on that, yet.